1 . 如图,在直角梯形
中,
,D为
边中点,将
沿
边折到
.连接
得到四棱锥
,记二面角
的平面角为
,下列说法中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/ed78f911-cb80-4467-bd91-6010f89b329a.png?resizew=350)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bf5dc946c282a561feb306ebf96755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43726b50a294057f87e0574e86f4e3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a921f7e5ddbb67adc1cd2658bb9a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c6caa0455442437177ab9b995df37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd92ae4f5a12404ca5bcc4428bc8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/ed78f911-cb80-4467-bd91-6010f89b329a.png?resizew=350)
A.若![]() ![]() ![]() |
B.无论![]() ![]() ![]() |
C.无论![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2023-03-16更新
|
550次组卷
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2卷引用:四川省凉山州2023届高三下学期二诊理科数学试题