设平面
,直线
与
交于S,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61b900cb931b4899a9c02e46ec44860.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67474b46a066b92f239fd0986257bd73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2ed602a145fff614d31451ce310639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61b900cb931b4899a9c02e46ec44860.png)
更新时间:2018-10-19 09:59:02
|
【知识点】 面面平行证明线线平行
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