1 . 在四棱锥
中,底面
为梯形,且
,点E在侧棱
上.下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb8efb8f9f5d1b9d1139f4653007c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
A.当E为![]() ![]() ![]() ![]() |
B.当E为![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.若平面![]() ![]() ![]() |
D.若平面![]() ![]() ![]() |
您最近一年使用:0次
A.当E为![]() ![]() ![]() ![]() |
B.当E为![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.若平面![]() ![]() ![]() |
D.若平面![]() ![]() ![]() |