(多选)在等腰梯形
中,
分别是
的中点,沿
将
折起至
,使平面
平面
(如图).已知
,下列四个结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9238757804254960bc40fa9d87065559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdab42642e8ab513ac016ba6e862c688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68659368b068d9d1055bad7934a540c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119046f434815bfd1dfed1c855c4504b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0478bfa0e6fa4b1d87c386993d1190.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/a971053d-3586-421e-af62-c94cbed517ee.png?resizew=198)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2023-09-02 15:29:07
|
【知识点】 空间向量垂直的坐标表示
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