冬至日，33层的高层要154米的楼间距一楼才能全天有阳光！

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要琢磨日照，首先要弄明白正午太阳的影_blank class=infotextkey>get=_blank class=infotextkey>子_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>多长。

就算_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>地理_blank class=infotextkey>get=_blank class=infotextkey>知识，凭_blank class=infotextkey>get=_blank class=infotextkey>生活经验_blank class=infotextkey>get=_blank class=infotextkey>我们也_blank class=infotextkey>get=_blank class=infotextkey>知道，早_blank class=infotextkey>get=_blank class=infotextkey>上太阳在_blank class=infotextkey>get=_blank class=infotextkey>东边，影_blank class=infotextkey>get=_blank class=infotextkey>子在西边，影_blank class=infotextkey>get=_blank class=infotextkey>子很长；_blank class=infotextkey>get=_blank class=infotextkey>然后影_blank class=infotextkey>get=_blank class=infotextkey>子_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不断缩短，到正午太阳在_blank class=infotextkey>get=_blank class=infotextkey>南，影_blank class=infotextkey>get=_blank class=infotextkey>子出_blank class=infotextkey>get=_blank class=infotextkey>现在正北方，这_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候影_blank class=infotextkey>get=_blank class=infotextkey>子_blank class=infotextkey>最短；_blank class=infotextkey>get=_blank class=infotextkey>然后太阳偏_blank class=infotextkey>get=_blank class=infotextkey>到了西边，影_blank class=infotextkey>get=_blank class=infotextkey>子在_blank class=infotextkey>get=_blank class=infotextkey>东边，并且越来越长。

在一年_blank class=infotextkey>get=_blank class=infotextkey>中，_blank class=infotextkey>get=_blank class=infotextkey>每一天正午影_blank class=infotextkey>get=_blank class=infotextkey>子的长度_blank class=infotextkey>get=_blank class=infotextkey>也在_blank class=infotextkey>get=_blank class=infotextkey>变化。_blank class=infotextkey>get=_blank class=infotextkey>生活经验_blank class=infotextkey>get=_blank class=infotextkey>告诉_blank class=infotextkey>get=_blank class=infotextkey>我们，冬天的影_blank class=infotextkey>get=_blank class=infotextkey>子长，夏天的影_blank class=infotextkey>get=_blank class=infotextkey>子短。准确来说是冬至那天的影_blank class=infotextkey>get=_blank class=infotextkey>子_blank class=infotextkey>最长，夏至那天的影_blank class=infotextkey>get=_blank class=infotextkey>子_blank class=infotextkey>最短。

正午_blank class=infotextkey>时分的影_blank class=infotextkey>get=_blank class=infotextkey>子_blank class=infotextkey>get=_blank class=infotextkey>到底_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>多长？_blank class=infotextkey>get=_blank class=infotextkey>郑州_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>楼市算了出来。

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_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>39ayt.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="1.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0.47_blank class=infotextkey>30_blank class=infotextkey>get=_blank class=infotextkey>2158_blank class=infotextkey>get=_blank class=infotextkey>27_blank class=infotextkey>3_blank class=infotextkey>381_blank class=infotextkey>get=_blank class=infotextkey>295" dataw=""/>

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比如_blank class=infotextkey>3_blank class=infotextkey>3层_blank class=infotextkey>get=_blank class=infotextkey>高的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层，层_blank class=infotextkey>get=_blank class=infotextkey>高（板_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>中缝到_blank class=infotextkey>get=_blank class=infotextkey>中缝）_blank class=infotextkey>get=_blank class=infotextkey>2.85米，_blank class=infotextkey>get=_blank class=infotextkey>你_blank class=infotextkey>get=_blank class=infotextkey>买的是16层，_blank class=infotextkey>get=_blank class=infotextkey>你的_blank class=infotextkey>get=_blank class=infotextkey>楼前_blank class=infotextkey>面_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有一栋_blank class=infotextkey>一样_blank class=infotextkey>get=_blank class=infotextkey>高的_blank class=infotextkey>get=_blank class=infotextkey>楼，_blank class=infotextkey>get=_blank class=infotextkey>楼间距是_blank class=infotextkey>35米。也_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>你那一层前_blank class=infotextkey>面_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有（_blank class=infotextkey>3_blank class=infotextkey>3层—15层）×_blank class=infotextkey>get=_blank class=infotextkey>2.85米/层=5_blank class=infotextkey>get=_blank class=infotextkey>1._blank class=infotextkey>3米的_blank class=infotextkey>get=_blank class=infotextkey>高度，这5_blank class=infotextkey>get=_blank class=infotextkey>1._blank class=infotextkey>3米的_blank class=infotextkey>get=_blank class=infotextkey>高度冬至日正午的影_blank class=infotextkey>get=_blank class=infotextkey>子长度是5_blank class=infotextkey>get=_blank class=infotextkey>1._blank class=infotextkey>3米×1.6_blank class=infotextkey>get=_blank class=infotextkey>21_blank class=infotextkey>get=_blank class=infotextkey>2=8_blank class=infotextkey>3.17米，简直_blank class=infotextkey>get=_blank class=infotextkey>秒杀_blank class=infotextkey>35米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距。

擦！_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>原来_blank class=infotextkey>35米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距，_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>大家都愿_blank class=infotextkey>get=_blank class=infotextkey>选的16层，冬至正午竟_blank class=infotextkey>get=_blank class=infotextkey>没阳光！直到_blank class=infotextkey>get=_blank class=infotextkey>到了_blank class=infotextkey>get=_blank class=infotextkey>26层，影长_blank class=infotextkey>get=_blank class=infotextkey>才能短到_blank class=infotextkey>36.96米，才够得着一点点日照！

算法很_blank class=infotextkey>get=_blank class=infotextkey>简_blank class=infotextkey>单，.fan_blank class=infotextkey>g558.com/son_blank class=infotextkey>g_blank class=infotextkey>gan_blank class=infotextkey>g/ tar_blank class=infotextkey>get=_blank class=infotextkey>松岗_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>get=_blank class=infotextkey>产权_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>新_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>楼盘，但这里_blank class=infotextkey>面要_blank class=infotextkey>get=_blank class=infotextkey>注意的是，_blank class=infotextkey>get=_blank class=infotextkey>还要_blank class=infotextkey>get=_blank class=infotextkey>考虑两个因素：

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这_blank class=infotextkey>get=_blank class=infotextkey>一般_blank class=infotextkey>get=_blank class=infotextkey>都_blank class=infotextkey>get=_blank class=infotextkey>有，至_blank class=infotextkey>get=_blank class=infotextkey>少_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>高约1.1米的护沿，_blank class=infotextkey>如果是两梯三、两梯四的_blank class=infotextkey>get=_blank class=infotextkey>中间户，正_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>南方的_blank class=infotextkey>get=_blank class=infotextkey>楼顶很可能正好是_blank class=infotextkey>get=_blank class=infotextkey>突出_blank class=infotextkey>get=_blank class=infotextkey>楼顶四五米的电梯机_blank class=infotextkey>get=_blank class=infotextkey>房和步梯间顶帽。

_blank class=infotextkey>get=_blank class=infotextkey>2、要_blank class=infotextkey>get=_blank class=infotextkey>考虑两栋_blank class=infotextkey>get=_blank class=infotextkey>楼是否在同一_blank class=infotextkey>get=_blank class=infotextkey>地平线_blank class=infotextkey>get=_blank class=infotextkey>上，也_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>小区是否_blank class=infotextkey>get=_blank class=infotextkey>有坡度，_blank class=infotextkey>get=_blank class=infotextkey>楼是否随坡_blank class=infotextkey>get=_blank class=infotextkey>建造。

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要算_blank class=infotextkey>get=_blank class=infotextkey>这个先要_blank class=infotextkey>get=_blank class=infotextkey>知道_blank class=infotextkey>get=_blank class=infotextkey>郑州的纬度，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>综_blank class=infotextkey>合了_blank class=infotextkey>get=_blank class=infotextkey>几个能_blank class=infotextkey>get=_blank class=infotextkey>显示纬度的_blank class=infotextkey>get=_blank class=infotextkey>在线_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>地图，基本确_blank class=infotextkey>定_blank class=infotextkey>get=_blank class=infotextkey>郑州市_blank class=infotextkey>g_blank class=infotextkey>get=_blank class=infotextkey>107与梁河交汇处（_blank class=infotextkey>get=_blank class=infotextkey>花园口）是北纬_blank class=infotextkey>34°54′。

_blank class=infotextkey>get=_blank class=infotextkey>我们为_blank class=infotextkey>get=_blank class=infotextkey>什么取_blank class=infotextkey>get=_blank class=infotextkey>这么靠北的_blank class=infotextkey>get=_blank class=infotextkey>一个度数呢？因为越往北日影越长，_blank class=infotextkey>get=_blank class=infotextkey>花园口的日影是_blank class=infotextkey>get=_blank class=infotextkey>多长，_blank class=infotextkey>get=_blank class=infotextkey>郑州市区影长都只_blank class=infotextkey>get=_blank class=infotextkey>会更短，_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>中央_blank class=infotextkey>get=_blank class=infotextkey>2018_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>get=_blank class=infotextkey>产权_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>政策，而_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>会更长。

_blank class=infotextkey>get=_blank class=infotextkey>你可能_blank class=infotextkey>get=_blank class=infotextkey>会想，哇！同一_blank class=infotextkey>get=_blank class=infotextkey>郑州的影长还_blank class=infotextkey>不_blank class=infotextkey>一样？是的，_blank class=infotextkey>get=_blank class=infotextkey>郑州_blank class=infotextkey>get=_blank class=infotextkey>太_blank class=infotextkey>get=_blank class=infotextkey>大了，_blank class=infotextkey>get=_blank class=infotextkey>我们也量了_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>get=_blank class=infotextkey>南_blank class=infotextkey>get=_blank class=infotextkey>龙湖镇_blank class=infotextkey>get=_blank class=infotextkey>上_blank class=infotextkey>get=_blank class=infotextkey>比较靠_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>南的泰山路的纬度，是_blank class=infotextkey>34度_blank class=infotextkey>34分。一_blank class=infotextkey>get=_blank class=infotextkey>会_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>可以对比_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下冬至日_blank class=infotextkey>get=_blank class=infotextkey>南_blank class=infotextkey>get=_blank class=infotextkey>龙湖与_blank class=infotextkey>get=_blank class=infotextkey>花园口日影的长度差_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>多_blank class=infotextkey>get=_blank class=infotextkey>少。

冬至那天太阳直射_blank class=infotextkey>get=_blank class=infotextkey>南_blank class=infotextkey>get=_blank class=infotextkey>回归线，也_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>南纬_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>3°_blank class=infotextkey>get=_blank class=infotextkey>26′。

_blank class=infotextkey>g>冬至↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>39LHh.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="_blank class=infotextkey>get=_blank class=infotextkey>2.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0.9_blank class=infotextkey>305816_blank class=infotextkey>get=_blank class=infotextkey>1_blank class=infotextkey>35_blank class=infotextkey>0844_blank class=infotextkey>get=_blank class=infotextkey>28" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

为了_blank class=infotextkey>get=_blank class=infotextkey>看图明白，_blank class=infotextkey>get=_blank class=infotextkey>我们延长_blank class=infotextkey>get=_blank class=infotextkey>郑州所在纬度的_blank class=infotextkey>get=_blank class=infotextkey>地平线，假设_blank class=infotextkey>get=_blank class=infotextkey>一个物_blank class=infotextkey>get=_blank class=infotextkey>体的_blank class=infotextkey>get=_blank class=infotextkey>高度是a，_blank class=infotextkey>get=_blank class=infotextkey>那么影长_blank class=infotextkey>get=_blank class=infotextkey>就是b。

相似三角形对应角相等，角A的度数也是_blank class=infotextkey>34°45′+_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>3°_blank class=infotextkey>get=_blank class=infotextkey>26′=58°_blank class=infotextkey>get=_blank class=infotextkey>20′，秒、分、度是_blank class=infotextkey>get=_blank class=infotextkey>60进制，换算成_blank class=infotextkey>get=_blank class=infotextkey>10进制也_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>大约58._blank class=infotextkey>3_blank class=infotextkey>3_blank class=infotextkey>3_blank class=infotextkey>3°。_blank class=infotextkey>get=_blank class=infotextkey>一个直角三角形度数_blank class=infotextkey>get=_blank class=infotextkey>有了，求边a：边b的_blank class=infotextkey>比例，_blank class=infotextkey>get=_blank class=infotextkey>这个要用正弦_blank class=infotextkey>定理来算，的确_blank class=infotextkey>get=_blank class=infotextkey>比较_blank class=infotextkey>get=_blank class=infotextkey>麻烦，_blank class=infotextkey>get=_blank class=infotextkey>我们省了点事，在CAD里拉了_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下，很快就得知_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>比例是1：1.6_blank class=infotextkey>get=_blank class=infotextkey>21_blank class=infotextkey>get=_blank class=infotextkey>2。

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>3_blank class=infotextkey>get=_blank class=infotextkey>99BC.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="_blank class=infotextkey>3.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0.7467166979_blank class=infotextkey>36_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>get=_blank class=infotextkey>101" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

_blank class=infotextkey>如果是在_blank class=infotextkey>get=_blank class=infotextkey>南_blank class=infotextkey>get=_blank class=infotextkey>龙湖，_blank class=infotextkey>get=_blank class=infotextkey>我们算了_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下，冬至这天正午的物影_blank class=infotextkey>比例是1：1._blank class=infotextkey>get=_blank class=infotextkey>600。也_blank class=infotextkey>get=_blank class=infotextkey>就是同样是一栋_blank class=infotextkey>get=_blank class=infotextkey>100米的_blank class=infotextkey>get=_blank class=infotextkey>楼（一栋约_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层），在_blank class=infotextkey>get=_blank class=infotextkey>花园口的影长是16_blank class=infotextkey>get=_blank class=infotextkey>2.1_blank class=infotextkey>get=_blank class=infotextkey>2米，而在_blank class=infotextkey>get=_blank class=infotextkey>南_blank class=infotextkey>get=_blank class=infotextkey>龙湖是1_blank class=infotextkey>get=_blank class=infotextkey>60米，_blank class=infotextkey>get=_blank class=infotextkey>还是_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>有点_blank class=infotextkey>get=_blank class=infotextkey>差别的。

同理，春秋分_blank class=infotextkey>时太阳直射_blank class=infotextkey>get=_blank class=infotextkey>赤道，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>可以算出日影_blank class=infotextkey>比例_blank class=infotextkey>get=_blank class=infotextkey>大约是1：0.6976。夏至_blank class=infotextkey>时太阳直射北_blank class=infotextkey>get=_blank class=infotextkey>回归线，日影的_blank class=infotextkey>比例_blank class=infotextkey>get=_blank class=infotextkey>大约是1：0._blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>get=_blank class=infotextkey>29。

_blank class=infotextkey>g>春秋分和夏至日影_blank class=infotextkey>比例↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>397Fe.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="4.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="1.51_blank class=infotextkey>get=_blank class=infotextkey>21951_blank class=infotextkey>get=_blank class=infotextkey>21951_blank class=infotextkey>get=_blank class=infotextkey>2195" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

_blank class=infotextkey>get=_blank class=infotextkey>按照_blank class=infotextkey>get=_blank class=infotextkey>上一_blank class=infotextkey>部分的说法岂_blank class=infotextkey>_blank class=infotextkey>不是绝_blank class=infotextkey>get=_blank class=infotextkey>大数_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>子日照都_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不_blank class=infotextkey>合格？

_blank class=infotextkey>_blank class=infotextkey>不是的，_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不要恐慌，因为太阳从_blank class=infotextkey>get=_blank class=infotextkey>东到西，_blank class=infotextkey>get=_blank class=infotextkey>除了_blank class=infotextkey>get=_blank class=infotextkey>中午那一_blank class=infotextkey>get=_blank class=infotextkey>会，_blank class=infotextkey>get=_blank class=infotextkey>大_blank class=infotextkey>get=_blank class=infotextkey>多数_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候_blank class=infotextkey>get=_blank class=infotextkey>都是从偏_blank class=infotextkey>get=_blank class=infotextkey>东或偏西照_blank class=infotextkey>get=_blank class=infotextkey>下来的，_blank class=infotextkey>get=_blank class=infotextkey>中午_blank class=infotextkey>get=_blank class=infotextkey>没阳光，_blank class=infotextkey>get=_blank class=infotextkey>上午或_blank class=infotextkey>get=_blank class=infotextkey>下午反而_blank class=infotextkey>get=_blank class=infotextkey>有阳光。

_blank class=infotextkey>g>阳光侧_blank class=infotextkey>面照_blank class=infotextkey>get=_blank class=infotextkey>示意图↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>39Iyu.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="5.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0.8_blank class=infotextkey>get=_blank class=infotextkey>27_blank class=infotextkey>3_blank class=infotextkey>381_blank class=infotextkey>get=_blank class=infotextkey>2949640_blank class=infotextkey>get=_blank class=infotextkey>28" dataw=""/>

B_blank class=infotextkey>get=_blank class=infotextkey>楼在正午是在A_blank class=infotextkey>get=_blank class=infotextkey>楼的_blank class=infotextkey>get=_blank class=infotextkey>阴影内，而在其它_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间并_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不一_blank class=infotextkey>定是。

_blank class=infotextkey>get=_blank class=infotextkey>那么阳光是_blank class=infotextkey>get=_blank class=infotextkey>怎么从侧_blank class=infotextkey>面照_blank class=infotextkey>get=_blank class=infotextkey>下来的？

_blank class=infotextkey>get=_blank class=infotextkey>郑州_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>楼市整理出_blank class=infotextkey>get=_blank class=infotextkey>来了冬至那天太阳_blank class=infotextkey>get=_blank class=infotextkey>位置和影_blank class=infotextkey>get=_blank class=infotextkey>子长度。

_blank class=infotextkey>g>冬至日整点太阳_blank class=infotextkey>get=_blank class=infotextkey>位置与日影长度↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>20_blank class=infotextkey>39kbk.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="6.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="1.1_blank class=infotextkey>get=_blank class=infotextkey>1_blank class=infotextkey>3_blank class=infotextkey>3_blank class=infotextkey>get=_blank class=infotextkey>09_blank class=infotextkey>35_blank class=infotextkey>get=_blank class=infotextkey>251_blank class=infotextkey>get=_blank class=infotextkey>79856" dataw=""/>

_blank class=infotextkey>get=_blank class=infotextkey>由于算出_blank class=infotextkey>get=_blank class=infotextkey>上表_blank class=infotextkey>get=_blank class=infotextkey>非_blank class=infotextkey>get=_blank class=infotextkey>常复杂，所以_blank class=infotextkey>get=_blank class=infotextkey>我们只算了冬至这天，春、秋分和夏至_blank class=infotextkey>get=_blank class=infotextkey>没算。另外_blank class=infotextkey>如果冬至那天_blank class=infotextkey>get=_blank class=infotextkey>都_blank class=infotextkey>get=_blank class=infotextkey>有阳光，一年_blank class=infotextkey>get=_blank class=infotextkey>中其它的日_blank class=infotextkey>get=_blank class=infotextkey>子日照_blank class=infotextkey>get=_blank class=infotextkey>会_blank class=infotextkey>get=_blank class=infotextkey>更好。

表_blank class=infotextkey>get=_blank class=infotextkey>中_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>一个_blank class=infotextkey>get=_blank class=infotextkey>问题要说明，那_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>中午1_blank class=infotextkey>get=_blank class=infotextkey>2点太阳并_blank class=infotextkey>_blank class=infotextkey>不是在正_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>南方。_blank class=infotextkey>get=_blank class=infotextkey>这是因为_blank class=infotextkey>get=_blank class=infotextkey>郑州要比_blank class=infotextkey>get=_blank class=infotextkey>北京_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间所_blank class=infotextkey>get=_blank class=infotextkey>在的_blank class=infotextkey>get=_blank class=infotextkey>东_blank class=infotextkey>get=_blank class=infotextkey>八区偏西。但_blank class=infotextkey>get=_blank class=infotextkey>我们推算_blank class=infotextkey>get=_blank class=infotextkey>这个影长的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候，_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>考虑_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>时区的偏差，把1_blank class=infotextkey>get=_blank class=infotextkey>2点当成正午，这样_blank class=infotextkey>get=_blank class=infotextkey>会_blank class=infotextkey>get=_blank class=infotextkey>有误差，但_blank class=infotextkey>不差_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>多_blank class=infotextkey>get=_blank class=infotextkey>少。

_blank class=infotextkey>get=_blank class=infotextkey>我们仍拿_blank class=infotextkey>get=_blank class=infotextkey>上一_blank class=infotextkey>部分的例_blank class=infotextkey>get=_blank class=infotextkey>子来_blank class=infotextkey>get=_blank class=infotextkey>分析，一栋_blank class=infotextkey>3_blank class=infotextkey>3层_blank class=infotextkey>get=_blank class=infotextkey>高的_blank class=infotextkey>get=_blank class=infotextkey>楼，_blank class=infotextkey>get=_blank class=infotextkey>你是16层。但_blank class=infotextkey>get=_blank class=infotextkey>现在要_blank class=infotextkey>get=_blank class=infotextkey>再增加_blank class=infotextkey>get=_blank class=infotextkey>一个_blank class=infotextkey>get=_blank class=infotextkey>必须的_blank class=infotextkey>get=_blank class=infotextkey>条件，那_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>体的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>东西宽度，_blank class=infotextkey>get=_blank class=infotextkey>我们假设_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>体的宽度是40米。_blank class=infotextkey>get=_blank class=infotextkey>我们先算出来冬至那天，前_blank class=infotextkey>面那栋_blank class=infotextkey>get=_blank class=infotextkey>楼16层以_blank class=infotextkey>get=_blank class=infotextkey>上的那5_blank class=infotextkey>get=_blank class=infotextkey>1._blank class=infotextkey>3米的影长。

这样_blank class=infotextkey>get=_blank class=infotextkey>可以_blank class=infotextkey>get=_blank class=infotextkey>得到：

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>204_blank class=infotextkey>08JR.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="7.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0._blank class=infotextkey>3669064748_blank class=infotextkey>get=_blank class=infotextkey>2014_blank class=infotextkey>39" dataw=""/>

_blank class=infotextkey>g>_blank class=infotextkey>get=_blank class=infotextkey>再结_blank class=infotextkey>合太阳的角度，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>大致_blank class=infotextkey>get=_blank class=infotextkey>可以画_blank class=infotextkey>get=_blank class=infotextkey>一个图↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2040HeL.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="8.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="_blank class=infotextkey>get=_blank class=infotextkey>1._blank class=infotextkey>318_blank class=infotextkey>345_blank class=infotextkey>3_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>374_blank class=infotextkey>get=_blank class=infotextkey>1007_blank class=infotextkey>get=_blank class=infotextkey>2" dataw=""/>

从图_blank class=infotextkey>get=_blank class=infotextkey>中_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>可以看出来_blank class=infotextkey>get=_blank class=infotextkey>上午太阳一出，后_blank class=infotextkey>面的_blank class=infotextkey>get=_blank class=infotextkey>楼就_blank class=infotextkey>get=_blank class=infotextkey>有阳光（D户除外），到_blank class=infotextkey>get=_blank class=infotextkey>10点_blank class=infotextkey>get=_blank class=infotextkey>之前，_blank class=infotextkey>get=_blank class=infotextkey>楼的西侧开始_blank class=infotextkey>get=_blank class=infotextkey>进入前_blank class=infotextkey>get=_blank class=infotextkey>楼的_blank class=infotextkey>get=_blank class=infotextkey>阴影_blank class=infotextkey>get=_blank class=infotextkey>中，到1_blank class=infotextkey>get=_blank class=infotextkey>2点的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候，基本后_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>全在前_blank class=infotextkey>get=_blank class=infotextkey>楼的_blank class=infotextkey>get=_blank class=infotextkey>阴影_blank class=infotextkey>get=_blank class=infotextkey>中了。_blank class=infotextkey>get=_blank class=infotextkey>下午的_blank class=infotextkey>get=_blank class=infotextkey>情况是_blank class=infotextkey>get=_blank class=infotextkey>上午的_blank class=infotextkey>get=_blank class=infotextkey>情况反过来，_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>再画。

同样，_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>你_blank class=infotextkey>不想_blank class=infotextkey>get=_blank class=infotextkey>了解太阳_blank class=infotextkey>get=_blank class=infotextkey>位置和影_blank class=infotextkey>get=_blank class=infotextkey>子长度是_blank class=infotextkey>get=_blank class=infotextkey>怎么得出来的，_blank class=infotextkey>get=_blank class=infotextkey>可以直接跳过_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>面计算过程看_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>第三_blank class=infotextkey>部分了。_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>你_blank class=infotextkey>get=_blank class=infotextkey>有兴趣_blank class=infotextkey>get=_blank class=infotextkey>知道_blank class=infotextkey>get=_blank class=infotextkey>我们是_blank class=infotextkey>get=_blank class=infotextkey>怎么算出来的，_blank class=infotextkey>get=_blank class=infotextkey>可以看_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>面的计算过程——_blank class=infotextkey>get=_blank class=infotextkey>有的_blank class=infotextkey>get=_blank class=infotextkey>步骤称_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>上计算，是推算和估算。

春、秋分太阳直射_blank class=infotextkey>get=_blank class=infotextkey>赤道，整个_blank class=infotextkey>get=_blank class=infotextkey>地球昼夜等分，也_blank class=infotextkey>get=_blank class=infotextkey>就是6点日出，18点日落。夏至日和冬至日的日出、日落_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间，_blank class=infotextkey>get=_blank class=infotextkey>需要_blank class=infotextkey>get=_blank class=infotextkey>我们来算_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下。

_blank class=infotextkey>g>冬至日_blank class=infotextkey>get=_blank class=infotextkey>郑州日出_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2040lze.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="9.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="1._blank class=infotextkey>get=_blank class=infotextkey>10_blank class=infotextkey>318949_blank class=infotextkey>34_blank class=infotextkey>3_blank class=infotextkey>3_blank class=infotextkey>396" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>再以线段AB为直径画_blank class=infotextkey>get=_blank class=infotextkey>一个_blank class=infotextkey>get=_blank class=infotextkey>小圆，_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>get=_blank class=infotextkey>小圆_blank class=infotextkey>get=_blank class=infotextkey>就是_blank class=infotextkey>get=_blank class=infotextkey>郑州所在纬度的_blank class=infotextkey>那个圈。C点是_blank class=infotextkey>get=_blank class=infotextkey>郑州所_blank class=infotextkey>get=_blank class=infotextkey>在的纬度与晨昏线的交点。

_blank class=infotextkey>get=_blank class=infotextkey>我们以C点为准画_blank class=infotextkey>get=_blank class=infotextkey>一条垂线与_blank class=infotextkey>get=_blank class=infotextkey>小圆相交于D点，_blank class=infotextkey>如果E点是早晨6点的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候，_blank class=infotextkey>get=_blank class=infotextkey>那么D点_blank class=infotextkey>get=_blank class=infotextkey>就是冬至那天日出的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间点。这里_blank class=infotextkey>get=_blank class=infotextkey>注意思维要跳跃_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下，看_blank class=infotextkey>get=_blank class=infotextkey>大圆的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候想象_blank class=infotextkey>get=_blank class=infotextkey>自己是从_blank class=infotextkey>get=_blank class=infotextkey>赤道_blank class=infotextkey>get=_blank class=infotextkey>上空_blank class=infotextkey>get=_blank class=infotextkey>看的，而看_blank class=infotextkey>get=_blank class=infotextkey>小圆_blank class=infotextkey>时要想象_blank class=infotextkey>get=_blank class=infotextkey>自己是从北极_blank class=infotextkey>get=_blank class=infotextkey>上空_blank class=infotextkey>get=_blank class=infotextkey>看的。_blank class=infotextkey>get=_blank class=infotextkey>我们用CAD量出来角a是17.6°。

同样的算法，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>可以算出_blank class=infotextkey>get=_blank class=infotextkey>郑州夏至日是4：50日出，19：_blank class=infotextkey>get=_blank class=infotextkey>10日落。实际日出、日落_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间_blank class=infotextkey>get=_blank class=infotextkey>会比_blank class=infotextkey>get=_blank class=infotextkey>这个晚_blank class=infotextkey>get=_blank class=infotextkey>一些，因为_blank class=infotextkey>get=_blank class=infotextkey>郑州比_blank class=infotextkey>get=_blank class=infotextkey>北京_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间所_blank class=infotextkey>get=_blank class=infotextkey>在的_blank class=infotextkey>get=_blank class=infotextkey>东_blank class=infotextkey>get=_blank class=infotextkey>八区往西一点，为了方便计算，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>忽略了这一因素。

_blank class=infotextkey>g>二分二至_blank class=infotextkey>get=_blank class=infotextkey>郑州日出、日落_blank class=infotextkey>演示↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" datas="_blank class=infotextkey>300,640" datatype="jpe_blank class=infotextkey>g" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2040KbN.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" dataratio="0.85178_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>36_blank class=infotextkey>3977486" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

_blank class=infotextkey>get=_blank class=infotextkey>有了日出日落的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间点还远远_blank class=infotextkey>不够，因为太阳在空_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>中的轨迹是_blank class=infotextkey>get=_blank class=infotextkey>东边升起，_blank class=infotextkey>get=_blank class=infotextkey>然后渐渐偏_blank class=infotextkey>get=_blank class=infotextkey>南，直到正午。正午过后则相反。甚至冬天太阳从_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>东_blank class=infotextkey>get=_blank class=infotextkey>南升起，夏天太阳从_blank class=infotextkey>get=_blank class=infotextkey>东北升起。

_blank class=infotextkey>get=_blank class=infotextkey>现在_blank class=infotextkey>get=_blank class=infotextkey>我们要算出来_blank class=infotextkey>get=_blank class=infotextkey>每个_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间点太阳偏_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>南的度数。_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>get=_blank class=infotextkey>怎么算，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>没想到，但_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>找到_blank class=infotextkey>get=_blank class=infotextkey>一个_blank class=infotextkey>get=_blank class=infotextkey>在线_blank class=infotextkey>演示太阳升落的_blank class=infotextkey>网站，由_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>网站_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>大_blank class=infotextkey>get=_blank class=infotextkey>概测出冬至那天，_blank class=infotextkey>get=_blank class=infotextkey>郑州的太阳_blank class=infotextkey>get=_blank class=infotextkey>大致_blank class=infotextkey>get=_blank class=infotextkey>位置，_blank class=infotextkey>get=_blank class=infotextkey>就是本_blank class=infotextkey>部分_blank class=infotextkey>第_blank class=infotextkey>get=_blank class=infotextkey>一个表格_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>中的太阳_blank class=infotextkey>get=_blank class=infotextkey>位置的_blank class=infotextkey>get=_blank class=infotextkey>那些_blank class=infotextkey>get=_blank class=infotextkey>数据。

7：_blank class=infotextkey>get=_blank class=infotextkey>10日出_blank class=infotextkey>时，阳光与_blank class=infotextkey>get=_blank class=infotextkey>地_blank class=infotextkey>面的夹角是0度；正午太阳在正_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>南方_blank class=infotextkey>时，阳光与_blank class=infotextkey>get=_blank class=infotextkey>地_blank class=infotextkey>面的夹角是_blank class=infotextkey>31.67°（90°—58._blank class=infotextkey>3_blank class=infotextkey>3°=_blank class=infotextkey>31.67°），这一点_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>通过本文_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>第一_blank class=infotextkey>部分的_blank class=infotextkey>get=_blank class=infotextkey>数据很容易_blank class=infotextkey>就能得出来。这样_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>可以把_blank class=infotextkey>get=_blank class=infotextkey>郑州的_blank class=infotextkey>get=_blank class=infotextkey>地平_blank class=infotextkey>面向四周延展，_blank class=infotextkey>get=_blank class=infotextkey>画出如_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>get=_blank class=infotextkey>一个立_blank class=infotextkey>get=_blank class=infotextkey>体图。

_blank class=infotextkey>g>_blank class=infotextkey>get=_blank class=infotextkey>地平_blank class=infotextkey>面立_blank class=infotextkey>get=_blank class=infotextkey>体图↓↓↓_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" datas="_blank class=infotextkey>300,640" datatype="jpe_blank class=infotextkey>g" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2040Phq.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" dataratio="0.917448405_blank class=infotextkey>get=_blank class=infotextkey>25_blank class=infotextkey>3_blank class=infotextkey>get=_blank class=infotextkey>28_blank class=infotextkey>3_blank class=infotextkey>3" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

_blank class=infotextkey>get=_blank class=infotextkey>我们假_blank class=infotextkey>定线段BF是_blank class=infotextkey>get=_blank class=infotextkey>1000，线段CE、ED、EF是相等的。但_blank class=infotextkey>get=_blank class=infotextkey>这个线段是_blank class=infotextkey>get=_blank class=infotextkey>多长，_blank class=infotextkey>get=_blank class=infotextkey>这个我_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>知道该_blank class=infotextkey>get=_blank class=infotextkey>怎么算出来。但我用笨方法穷举，在CAD的帮助_blank class=infotextkey>get=_blank class=infotextkey>下，得出_blank class=infotextkey>get=_blank class=infotextkey>这个长度_blank class=infotextkey>get=_blank class=infotextkey>大约是_blank class=infotextkey>get=_blank class=infotextkey>1_blank class=infotextkey>318.81。

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2040HBI.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="1_blank class=infotextkey>get=_blank class=infotextkey>2.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="1._blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>30769_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>30769_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>3_blank class=infotextkey>08" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

在CAD里建出三个与_blank class=infotextkey>get=_blank class=infotextkey>上_blank class=infotextkey>面的立_blank class=infotextkey>get=_blank class=infotextkey>体图_blank class=infotextkey>get=_blank class=infotextkey>有关的平_blank class=infotextkey>面图，_blank class=infotextkey>get=_blank class=infotextkey>一个_blank class=infotextkey>get=_blank class=infotextkey>可以当做从天空俯视，_blank class=infotextkey>get=_blank class=infotextkey>一个是从_blank class=infotextkey>get=_blank class=infotextkey>东侧视，_blank class=infotextkey>get=_blank class=infotextkey>一个是太阳在这9_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>时40分内走过的_blank class=infotextkey>那个半圆。这三个图关键点_blank class=infotextkey>get=_blank class=infotextkey>水平、竖直对应。

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>204_blank class=infotextkey>08rT.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="_blank class=infotextkey>get=_blank class=infotextkey>1_blank class=infotextkey>3.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="1.18574_blank class=infotextkey>get=_blank class=infotextkey>10881_blank class=infotextkey>get=_blank class=infotextkey>80_blank class=infotextkey>11_blank class=infotextkey>get=_blank class=infotextkey>25" dataw="5_blank class=infotextkey>3_blank class=infotextkey>3"/>

8：00的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候，也_blank class=infotextkey>get=_blank class=infotextkey>就是日出50分钟后，太阳_blank class=infotextkey>get=_blank class=infotextkey>会移动15.5°（0._blank class=infotextkey>31度/分钟×50分钟），在右_blank class=infotextkey>get=_blank class=infotextkey>上角太阳走过的那半圆_blank class=infotextkey>get=_blank class=infotextkey>中_blank class=infotextkey>get=_blank class=infotextkey>画出_blank class=infotextkey>get=_blank class=infotextkey>这个角度。将_blank class=infotextkey>get=_blank class=infotextkey>这个角度对应到俯视图_blank class=infotextkey>get=_blank class=infotextkey>中，_blank class=infotextkey>get=_blank class=infotextkey>再对应到西视图_blank class=infotextkey>get=_blank class=infotextkey>中。_blank class=infotextkey>get=_blank class=infotextkey>那么a的_blank class=infotextkey>get=_blank class=infotextkey>高度当做物_blank class=infotextkey>get=_blank class=infotextkey>体的_blank class=infotextkey>get=_blank class=infotextkey>高度，b的长度_blank class=infotextkey>get=_blank class=infotextkey>就是影长。

在CAD里，很容易拉出_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>比例是1：7.51。

同样的方法拉出_blank class=infotextkey>get=_blank class=infotextkey>10：00的物影_blank class=infotextkey>比例是1：1.9_blank class=infotextkey>get=_blank class=infotextkey>2。_blank class=infotextkey>11点_blank class=infotextkey>时是1：1.68。1_blank class=infotextkey>get=_blank class=infotextkey>2：00_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>可以_blank class=infotextkey>近似_blank class=infotextkey>get=_blank class=infotextkey>地认为_blank class=infotextkey>get=_blank class=infotextkey>就是正午，日影_blank class=infotextkey>比例是本文_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>第一_blank class=infotextkey>部分算出来的1：1.6_blank class=infotextkey>get=_blank class=infotextkey>21_blank class=infotextkey>get=_blank class=infotextkey>2。

_blank class=infotextkey>get=_blank class=infotextkey>通过_blank class=infotextkey>get=_blank class=infotextkey>上两_blank class=infotextkey>部分，_blank class=infotextkey>get=_blank class=infotextkey>我们的_blank class=infotextkey>get=_blank class=infotextkey>理论说_blank class=infotextkey>get=_blank class=infotextkey>完了。_blank class=infotextkey>get=_blank class=infotextkey>如何_blank class=infotextkey>get=_blank class=infotextkey>分析_blank class=infotextkey>get=_blank class=infotextkey>自己家的_blank class=infotextkey>get=_blank class=infotextkey>采光也_blank class=infotextkey>get=_blank class=infotextkey>介绍了，但恐怕_blank class=infotextkey>get=_blank class=infotextkey>有些读者_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有点懵，或者_blank class=infotextkey>get=_blank class=infotextkey>觉得太复杂，无从_blank class=infotextkey>get=_blank class=infotextkey>下手。

_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>面_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>再来梳理_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>get=_blank class=infotextkey>这个过程，并_blank class=infotextkey>get=_blank class=infotextkey>介绍一点_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>get=_blank class=infotextkey>技巧，_blank class=infotextkey>get=_blank class=infotextkey>让_blank class=infotextkey>get=_blank class=infotextkey>你轻松弄明白_blank class=infotextkey>get=_blank class=infotextkey>自己_blank class=infotextkey>get=_blank class=infotextkey>家里冬至那天_blank class=infotextkey>get=_blank class=infotextkey>到底_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>有的日照。

还以前文的例_blank class=infotextkey>get=_blank class=infotextkey>子，_blank class=infotextkey>不过这次_blank class=infotextkey>get=_blank class=infotextkey>我们来算一_blank class=infotextkey>get=_blank class=infotextkey>楼，并且_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>再增加两个_blank class=infotextkey>get=_blank class=infotextkey>条件：_blank class=infotextkey>get=_blank class=infotextkey>楼都变成两个_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>单元，前_blank class=infotextkey>get=_blank class=infotextkey>楼的_blank class=infotextkey>get=_blank class=infotextkey>东侧_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有一栋_blank class=infotextkey>get=_blank class=infotextkey>楼，左右间距_blank class=infotextkey>30米。

_blank class=infotextkey>get=_blank class=infotextkey>准备_blank class=infotextkey>get=_blank class=infotextkey>数据：与前_blank class=infotextkey>get=_blank class=infotextkey>楼的_blank class=infotextkey>get=_blank class=infotextkey>楼间距、层_blank class=infotextkey>get=_blank class=infotextkey>高、_blank class=infotextkey>get=_blank class=infotextkey>你的_blank class=infotextkey>get=_blank class=infotextkey>楼层、_blank class=infotextkey>get=_blank class=infotextkey>楼的宽度。_blank class=infotextkey>get=_blank class=infotextkey>还要_blank class=infotextkey>get=_blank class=infotextkey>注意前_blank class=infotextkey>get=_blank class=infotextkey>楼的左右是否_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有并排的_blank class=infotextkey>get=_blank class=infotextkey>楼，_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>有，_blank class=infotextkey>get=_blank class=infotextkey>高是_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>多_blank class=infotextkey>get=_blank class=infotextkey>少。其它_blank class=infotextkey>get=_blank class=infotextkey>还要_blank class=infotextkey>get=_blank class=infotextkey>考虑前_blank class=infotextkey>get=_blank class=infotextkey>楼的顶_blank class=infotextkey>get=_blank class=infotextkey>上是否_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有加_blank class=infotextkey>get=_blank class=infotextkey>高的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>装饰或_blank class=infotextkey>get=_blank class=infotextkey>设备间，_blank class=infotextkey>get=_blank class=infotextkey>我们假设前_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>楼顶_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有1._blank class=infotextkey>get=_blank class=infotextkey>2米_blank class=infotextkey>get=_blank class=infotextkey>高的护墙。_blank class=infotextkey>get=_blank class=infotextkey>还要_blank class=infotextkey>get=_blank class=infotextkey>考虑前后_blank class=infotextkey>get=_blank class=infotextkey>楼的_blank class=infotextkey>get=_blank class=infotextkey>地平线是否_blank class=infotextkey>get=_blank class=infotextkey>高度一致。

打开_blank class=infotextkey>get=_blank class=infotextkey>一个空白Word，把左、右、_blank class=infotextkey>get=_blank class=infotextkey>上页边距设置成_blank class=infotextkey>get=_blank class=infotextkey>10毫米，_blank class=infotextkey>get=_blank class=infotextkey>下边设置成19.7毫米。_blank class=infotextkey>get=_blank class=infotextkey>然后插入_blank class=infotextkey>get=_blank class=infotextkey>一个19列、_blank class=infotextkey>get=_blank class=infotextkey>27_blank class=infotextkey>get=_blank class=infotextkey>行的表格，把表格四边调到Word四个_blank class=infotextkey>定位角码附_blank class=infotextkey>近。_blank class=infotextkey>get=_blank class=infotextkey>然后_blank class=infotextkey>get=_blank class=infotextkey>平均分_blank class=infotextkey>get=_blank class=infotextkey>布各行、_blank class=infotextkey>get=_blank class=infotextkey>平均分_blank class=infotextkey>get=_blank class=infotextkey>布各列。把这纸打印出来，_blank class=infotextkey>get=_blank class=infotextkey>每一格基本_blank class=infotextkey>get=_blank class=infotextkey>上是一_blank class=infotextkey>get=_blank class=infotextkey>公分。

_blank class=infotextkey>get=_blank class=infotextkey>准备_blank class=infotextkey>get=_blank class=infotextkey>一把直尺，_blank class=infotextkey>get=_blank class=infotextkey>一个量角器。

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>204_blank class=infotextkey>08dQ.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="14.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0.75" dataw="4_blank class=infotextkey>get=_blank class=infotextkey>80"/>

在方格纸_blank class=infotextkey>get=_blank class=infotextkey>上_blank class=infotextkey>get=_blank class=infotextkey>画出对日照_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>影响的_blank class=infotextkey>get=_blank class=infotextkey>楼的平_blank class=infotextkey>面图，为了直观，画成_blank class=infotextkey>get=_blank class=infotextkey>南_blank class=infotextkey>get=_blank class=infotextkey>上北_blank class=infotextkey>get=_blank class=infotextkey>下，这样方便想像_blank class=infotextkey>get=_blank class=infotextkey>你正站在_blank class=infotextkey>get=_blank class=infotextkey>阳台_blank class=infotextkey>get=_blank class=infotextkey>上。用一格_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>代表_blank class=infotextkey>get=_blank class=infotextkey>10米。

先在图_blank class=infotextkey>get=_blank class=infotextkey>中_blank class=infotextkey>get=_blank class=infotextkey>画出8点_blank class=infotextkey>时影_blank class=infotextkey>get=_blank class=infotextkey>子的角度。正_blank class=infotextkey>get=_blank class=infotextkey>南偏_blank class=infotextkey>get=_blank class=infotextkey>东6_blank class=infotextkey>get=_blank class=infotextkey>2°。也_blank class=infotextkey>get=_blank class=infotextkey>就是角a是6_blank class=infotextkey>get=_blank class=infotextkey>2°。

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2040R7c.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" title="15.jp_blank class=infotextkey>g" datatype="jpe_blank class=infotextkey>g" dataratio="0.6791_blank class=infotextkey>get=_blank class=infotextkey>666_blank class=infotextkey>get=_blank class=infotextkey>666_blank class=infotextkey>get=_blank class=infotextkey>666667" dataw="4_blank class=infotextkey>get=_blank class=infotextkey>80"/>

_blank class=infotextkey>get=_blank class=infotextkey>再算8点_blank class=infotextkey>时影_blank class=infotextkey>get=_blank class=infotextkey>子的长度。_blank class=infotextkey>3_blank class=infotextkey>3层×_blank class=infotextkey>get=_blank class=infotextkey>2.85米/层=94.05米，_blank class=infotextkey>get=_blank class=infotextkey>楼总_blank class=infotextkey>get=_blank class=infotextkey>高是94._blank class=infotextkey>get=_blank class=infotextkey>25米＋1._blank class=infotextkey>get=_blank class=infotextkey>2米_blank class=infotextkey>get=_blank class=infotextkey>楼顶护沿=95._blank class=infotextkey>get=_blank class=infotextkey>25米，_blank class=infotextkey>get=_blank class=infotextkey>楼的影_blank class=infotextkey>get=_blank class=infotextkey>子长是95._blank class=infotextkey>get=_blank class=infotextkey>25米×7.51=715._blank class=infotextkey>3米。把_blank class=infotextkey>get=_blank class=infotextkey>这个影长用尺_blank class=infotextkey>get=_blank class=infotextkey>子量着在图_blank class=infotextkey>get=_blank class=infotextkey>上_blank class=infotextkey>get=_blank class=infotextkey>画出来，也_blank class=infotextkey>get=_blank class=infotextkey>就是71.5_blank class=infotextkey>get=_blank class=infotextkey>公分（纸_blank class=infotextkey>get=_blank class=infotextkey>上还画_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>下，那_blank class=infotextkey>就能画_blank class=infotextkey>get=_blank class=infotextkey>多长画_blank class=infotextkey>get=_blank class=infotextkey>多长）。

_blank class=infotextkey>get=_blank class=infotextkey>画出9点的影_blank class=infotextkey>get=_blank class=infotextkey>子角度。计算影长，95._blank class=infotextkey>get=_blank class=infotextkey>25米×_blank class=infotextkey>get=_blank class=infotextkey>2.68=_blank class=infotextkey>get=_blank class=infotextkey>255._blank class=infotextkey>3米。_blank class=infotextkey>get=_blank class=infotextkey>然后依次_blank class=infotextkey>get=_blank class=infotextkey>画出_blank class=infotextkey>get=_blank class=infotextkey>10点、_blank class=infotextkey>11点、1_blank class=infotextkey>get=_blank class=infotextkey>2点影_blank class=infotextkey>get=_blank class=infotextkey>子的角度，并计算和_blank class=infotextkey>get=_blank class=infotextkey>画出影长。

_blank class=infotextkey>get=_blank class=infotextkey>现在_blank class=infotextkey>get=_blank class=infotextkey>可以看结果了：

1_blank class=infotextkey>get=_blank class=infotextkey>2点影长_blank class=infotextkey>最短，但也长达154._blank class=infotextkey>3米，所以阳光_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不可能来自前_blank class=infotextkey>get=_blank class=infotextkey>楼的顶_blank class=infotextkey>get=_blank class=infotextkey>上，_blank class=infotextkey>get=_blank class=infotextkey>都是来自前_blank class=infotextkey>面那两栋_blank class=infotextkey>get=_blank class=infotextkey>楼的缝里。7：_blank class=infotextkey>get=_blank class=infotextkey>10分太阳出来后能照在6户。_blank class=infotextkey>不足_blank class=infotextkey>get=_blank class=infotextkey>一个_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>时_blank class=infotextkey>get=_blank class=infotextkey>到了8点，日照都_blank class=infotextkey>get=_blank class=infotextkey>到了6户的_blank class=infotextkey>get=_blank class=infotextkey>东墙_blank class=infotextkey>get=_blank class=infotextkey>上。9点的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时候阳光照在_blank class=infotextkey>3、4、5户，但_blank class=infotextkey>get=_blank class=infotextkey>注意4户_blank class=infotextkey>get=_blank class=infotextkey>会被_blank class=infotextkey>3户挡掉_blank class=infotextkey>get=_blank class=infotextkey>一些。_blank class=infotextkey>get=_blank class=infotextkey>10点阳光在1、_blank class=infotextkey>get=_blank class=infotextkey>2户_blank class=infotextkey>get=_blank class=infotextkey>上，_blank class=infotextkey>3户也_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有一_blank class=infotextkey>get=_blank class=infotextkey>小点。_blank class=infotextkey>11点能照到1户和_blank class=infotextkey>get=_blank class=infotextkey>2户。1_blank class=infotextkey>get=_blank class=infotextkey>2点1户能照到一_blank class=infotextkey>get=_blank class=infotextkey>小点。

_blank class=infotextkey>get=_blank class=infotextkey>这是_blank class=infotextkey>get=_blank class=infotextkey>上午的日照，_blank class=infotextkey>get=_blank class=infotextkey>每一户的_blank class=infotextkey>get=_blank class=infotextkey>采光在0—_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>时之间。_blank class=infotextkey>get=_blank class=infotextkey>下午的日照_blank class=infotextkey>get=_blank class=infotextkey>情况是_blank class=infotextkey>get=_blank class=infotextkey>上午的对称，_blank class=infotextkey>get=_blank class=infotextkey>上午_blank class=infotextkey>get=_blank class=infotextkey>没阳光的8户，_blank class=infotextkey>get=_blank class=infotextkey>下午_blank class=infotextkey>get=_blank class=infotextkey>会_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>大约两个_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>时的日照。这_blank class=infotextkey>get=_blank class=infotextkey>规划看_blank class=infotextkey>get=_blank class=infotextkey>起来是压着_blank class=infotextkey>get=_blank class=infotextkey>国家_blank class=infotextkey>get=_blank class=infotextkey>规_blank class=infotextkey>定来做的。

_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>你的_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>身的斜的，_blank class=infotextkey>_blank class=infotextkey>不是正_blank class=infotextkey>get=_blank class=infotextkey>南正北，那就斜着画。只要把方格_blank class=infotextkey>get=_blank class=infotextkey>保持正_blank class=infotextkey>get=_blank class=infotextkey>南正北即可。

可能_blank class=infotextkey>get=_blank class=infotextkey>还_blank class=infotextkey>get=_blank class=infotextkey>有读者_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不能_blank class=infotextkey>get=_blank class=infotextkey>画出_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>子的日照_blank class=infotextkey>get=_blank class=infotextkey>影响图，也许是_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间，也许是懒得算，也许是_blank class=infotextkey>get=_blank class=infotextkey>还是_blank class=infotextkey>get=_blank class=infotextkey>没看懂。那_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>再给_blank class=infotextkey>get=_blank class=infotextkey>一些直接的建议。

_blank class=infotextkey>g>1、_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>你想_blank class=infotextkey>要买_blank class=infotextkey>get=_blank class=infotextkey>一套_blank class=infotextkey>get=_blank class=infotextkey>全年、_blank class=infotextkey>get=_blank class=infotextkey>全天，只要出太阳就_blank class=infotextkey>get=_blank class=infotextkey>有阳光的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>子，_blank class=infotextkey>get=_blank class=infotextkey>那么请参考_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>面的表格：_blank class=infotextkey>g>

_blank class=infotextkey>g>_blank class=infotextkey>如果是_blank class=infotextkey>get=_blank class=infotextkey>2.85米的层_blank class=infotextkey>get=_blank class=infotextkey>高（_blank class=infotextkey>get=_blank class=infotextkey>含_blank class=infotextkey>get=_blank class=infotextkey>楼板，_blank class=infotextkey>get=_blank class=infotextkey>楼板_blank class=infotextkey>get=_blank class=infotextkey>中缝到_blank class=infotextkey>get=_blank class=infotextkey>中缝），_blank class=infotextkey>get=_blank class=infotextkey>我们看_blank class=infotextkey>get=_blank class=infotextkey>一_blank class=infotextkey>get=_blank class=infotextkey>下_blank class=infotextkey>最低哪一层冬至日_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有日照：_blank class=infotextkey>g>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" datas="_blank class=infotextkey>300,640" datatype="pn_blank class=infotextkey>g" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2041cek.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" dataratio="0.917_blank class=infotextkey>get=_blank class=infotextkey>266187050_blank class=infotextkey>3597" dataw=""/>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" datas="_blank class=infotextkey>300,640" datatype="pn_blank class=infotextkey>g" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2041ad_blank class=infotextkey>g.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" dataratio="0.917_blank class=infotextkey>get=_blank class=infotextkey>266187050_blank class=infotextkey>3597" dataw=""/>

_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" datas="_blank class=infotextkey>300,640" datatype="pn_blank class=infotextkey>g" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2041ZQ6.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" dataratio="0.4_blank class=infotextkey>388489_blank class=infotextkey>get=_blank class=infotextkey>2_blank class=infotextkey>086_blank class=infotextkey>3_blank class=infotextkey>3_blank class=infotextkey>get=_blank class=infotextkey>09_blank class=infotextkey>34" dataw=""/>

举个例_blank class=infotextkey>get=_blank class=infotextkey>子：_blank class=infotextkey>如果前_blank class=infotextkey>面的_blank class=infotextkey>get=_blank class=infotextkey>楼是_blank class=infotextkey>3_blank class=infotextkey>3层_blank class=infotextkey>get=_blank class=infotextkey>高，40米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距，阳光能照到_blank class=infotextkey>get=_blank class=infotextkey>25.4层及以_blank class=infotextkey>get=_blank class=infotextkey>上的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>楼层。在日照_blank class=infotextkey>最差的冬至日也能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有日照。_blank class=infotextkey>get=_blank class=infotextkey>你买_blank class=infotextkey>get=_blank class=infotextkey>25层，日照还_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>全，_blank class=infotextkey>get=_blank class=infotextkey>你站窗前_blank class=infotextkey>get=_blank class=infotextkey>大_blank class=infotextkey>get=_blank class=infotextkey>概能照到_blank class=infotextkey>get=_blank class=infotextkey>你的腰以_blank class=infotextkey>get=_blank class=infotextkey>上。_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>楼层_blank class=infotextkey>get=_blank class=infotextkey>再低冬至正午_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>有日照。

_blank class=infotextkey>g>_blank class=infotextkey>如果是_blank class=infotextkey>3米的层_blank class=infotextkey>get=_blank class=infotextkey>高（_blank class=infotextkey>get=_blank class=infotextkey>含_blank class=infotextkey>get=_blank class=infotextkey>楼板，_blank class=infotextkey>get=_blank class=infotextkey>楼板_blank class=infotextkey>get=_blank class=infotextkey>中缝到_blank class=infotextkey>get=_blank class=infotextkey>中缝），_blank class=infotextkey>3米层_blank class=infotextkey>get=_blank class=infotextkey>高_blank class=infotextkey>get=_blank class=infotextkey>一般是_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层或洋_blank class=infotextkey>get=_blank class=infotextkey>房，_blank class=infotextkey>get=_blank class=infotextkey>由于计算量_blank class=infotextkey>get=_blank class=infotextkey>太_blank class=infotextkey>get=_blank class=infotextkey>大，_blank class=infotextkey>get=_blank class=infotextkey>我们_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>有算_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层的，只算了_blank class=infotextkey>11层的_blank class=infotextkey>get=_blank class=infotextkey>小_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层和6层的洋_blank class=infotextkey>get=_blank class=infotextkey>房。_blank class=infotextkey>g>

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_blank class=infotextkey>gn="center">_blank class=infotextkey>g alt="冬至日，_blank class=infotextkey>3_blank class=infotextkey>3层的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>高层要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>全天_blank class=infotextkey>get=_blank class=infotextkey>有阳光！" datas="_blank class=infotextkey>300,640" datatype="pn_blank class=infotextkey>g" src="im_blank class=infotextkey>ga.mizhai.comhttp://www.fan_blank class=infotextkey>g558.com/uploads/articleim_blank class=infotextkey>g/146474_blank class=infotextkey>get=_blank class=infotextkey>2041UaJ.jp_blank class=infotextkey>gpcnews.jp_blank class=infotextkey>g" dataratio="0.6_blank class=infotextkey>get=_blank class=infotextkey>2949640_blank class=infotextkey>get=_blank class=infotextkey>28776978" dataw=""/>

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_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>你的层数，_blank class=infotextkey>get=_blank class=infotextkey>上表_blank class=infotextkey>get=_blank class=infotextkey>中_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>含也_blank class=infotextkey>get=_blank class=infotextkey>可以推出来，比如_blank class=infotextkey>get=_blank class=infotextkey>你是_blank class=infotextkey>3._blank class=infotextkey>get=_blank class=infotextkey>2米的层_blank class=infotextkey>get=_blank class=infotextkey>高，但总_blank class=infotextkey>get=_blank class=infotextkey>高是8层（比如6层+_blank class=infotextkey>get=_blank class=infotextkey>2层）。_blank class=infotextkey>如果_blank class=infotextkey>get=_blank class=infotextkey>你的_blank class=infotextkey>get=_blank class=infotextkey>楼间距是_blank class=infotextkey>get=_blank class=infotextkey>21米，总_blank class=infotextkey>get=_blank class=infotextkey>高6层是_blank class=infotextkey>3层以_blank class=infotextkey>get=_blank class=infotextkey>上_blank class=infotextkey>get=_blank class=infotextkey>有日照，_blank class=infotextkey>get=_blank class=infotextkey>那么总_blank class=infotextkey>get=_blank class=infotextkey>高8层是_blank class=infotextkey>3层+_blank class=infotextkey>get=_blank class=infotextkey>2层，也_blank class=infotextkey>get=_blank class=infotextkey>就是5层以_blank class=infotextkey>get=_blank class=infotextkey>上_blank class=infotextkey>get=_blank class=infotextkey>有日照。

另外，前_blank class=infotextkey>面_blank class=infotextkey>get=_blank class=infotextkey>楼顶的_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>装饰和_blank class=infotextkey>get=_blank class=infotextkey>设备_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>突出_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>多_blank class=infotextkey>get=_blank class=infotextkey>少米，_blank class=infotextkey>get=_blank class=infotextkey>你这栋_blank class=infotextkey>get=_blank class=infotextkey>楼也要相应往_blank class=infotextkey>get=_blank class=infotextkey>上升_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>多_blank class=infotextkey>get=_blank class=infotextkey>少米_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>有阳光，这两个数值是相等的。看着电梯机_blank class=infotextkey>get=_blank class=infotextkey>房和步梯间顶帽_blank class=infotextkey>get=_blank class=infotextkey>突出了一层，那_blank class=infotextkey>get=_blank class=infotextkey>你也要往_blank class=infotextkey>get=_blank class=infotextkey>上买一层。

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首先_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不要死盯_blank class=infotextkey>get=_blank class=infotextkey>楼间距——_blank class=infotextkey>get=_blank class=infotextkey>这是本次庞_blank class=infotextkey>get=_blank class=infotextkey>大的计算得出的_blank class=infotextkey>最_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>重要的_blank class=infotextkey>get=_blank class=infotextkey>一个结论。盯_blank class=infotextkey>get=_blank class=infotextkey>楼间距_blank class=infotextkey>意义_blank class=infotextkey>不太，_blank class=infotextkey>get=_blank class=infotextkey>我们已算过，冬至_blank class=infotextkey>时_blank class=infotextkey>3_blank class=infotextkey>3层_blank class=infotextkey>get=_blank class=infotextkey>高要154米的_blank class=infotextkey>get=_blank class=infotextkey>楼间距一_blank class=infotextkey>get=_blank class=infotextkey>楼_blank class=infotextkey>get=_blank class=infotextkey>才能_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>全天日照，_blank class=infotextkey>get=_blank class=infotextkey>哪个_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>开发_blank class=infotextkey>get=_blank class=infotextkey>商舍得_blank class=infotextkey>get=_blank class=infotextkey>这么做？

另外_blank class=infotextkey>如果某一层正午_blank class=infotextkey>get=_blank class=infotextkey>没_blank class=infotextkey>get=_blank class=infotextkey>有阳光，阳光是从侧_blank class=infotextkey>面照进来的，_blank class=infotextkey>get=_blank class=infotextkey>那么加_blank class=infotextkey>get=_blank class=infotextkey>大_blank class=infotextkey>get=_blank class=infotextkey>楼间距也_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>会增加侧_blank class=infotextkey>面来的日照_blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>时间。这也是本次计算偶然_blank class=infotextkey>get=_blank class=infotextkey>发现的，但要用_blank class=infotextkey>get=_blank class=infotextkey>理论说明这一点也挺_blank class=infotextkey>get=_blank class=infotextkey>麻烦的，_blank class=infotextkey>get=_blank class=infotextkey>就_blank class=infotextkey>不_blank class=infotextkey>get=_blank class=infotextkey>说了，_blank class=infotextkey>get=_blank class=infotextkey>你记得_blank class=infotextkey>get=_blank class=infotextkey>有_blank class=infotextkey>get=_blank class=infotextkey>这个_blank class=infotextkey>定律就行。

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（完）

_blank class=infotextkey>get=_blank class=infotextkey>责任编辑：孟杰

标签: _blank class=infotextkey>get=_blank class=infotextkey>购_blank class=infotextkey>get=_blank class=infotextkey>房_blank class=infotextkey>get=_blank class=infotextkey>知识  _blank class=infotextkey>get=_blank class=infotextkey>_blank class=infotextkey>get=_blank class=infotextkey>楼市_blank class=infotextkey>get=_blank class=infotextkey>分析  

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