名校
1 . 正方形
的边长为2,点
是
的中点,点
是
的中点,点
是
的中点,将正方形沿
折起,如图所示,二面角
的大小为
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432b602bbaf82a4a40091ecfc8a8ffb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/a5ac6661-0457-48c4-8d35-34869360085a.png?resizew=171)
A.当![]() ![]() ![]() ![]() |
B.当![]() ![]() ![]() |
C.若![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
2 . 已知为圆锥
底面圆
的直径,
,
,点
为圆
上异于
的一点,
为线段
上的动点(异于端点),则( )
A.直线![]() ![]() ![]() |
B.圆锥![]() ![]() |
C.棱长为![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-12-02更新
|
605次组卷
|
3卷引用:重庆市九龙坡区育才中学校2024届高三下学期阶段测试数学试题
名校
3 . 如图,在平行四边形
中,
,
分别为
的中点,沿
将
折起到
的位置(
不在平面
上),在折起过程中,下列说法不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9bba30fadf42ba865a15f4a000da37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cde52e02168c74b4b1c0a8ce09287df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.若![]() ![]() ![]() ![]() |
B.存在某位置,使![]() |
C.当二面角![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
2022-11-30更新
|
1594次组卷
|
8卷引用:重庆市开州中学2024届高三下学期高考模拟考试(二)数学试题