1 . 如图,水平放置的正方形
边长为1,先将正方形
绕直线
向上旋转45°,得到正方形
,再将所得的正方形绕直线
向上旋转45°,得到正方形
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c22f4aeba083648901c31c137e8e90.png)
A.直线![]() ![]() |
B.![]() ![]() ![]() |
C.点![]() ![]() ![]() |
D.平面![]() ![]() |
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2 . 已知棱长为
的正四面体的平面展开图如图所示,P、Q分别是EF、EC的中点,在这个正四面体中,下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/e575ee8e-3de1-4e9a-a74c-9ef13149d703.png?resizew=137)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/e575ee8e-3de1-4e9a-a74c-9ef13149d703.png?resizew=137)
A.A、D、P、Q四点共面 | B.![]() |
C.![]() | D.该正四面体的外接球的体积为![]() |
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3 . 棱长为2的正四面体
中,
分别是
的中点,点
是棱
上的动点,则下列选项正确的有( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9b6bb1f3e46026af863b2b269ecf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b511eccad44ffbed4f9553e1cb1d1597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.存在点![]() ![]() ![]() |
B.存在点![]() ![]() |
C.![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
2022-07-04更新
|
401次组卷
|
2卷引用:福建省宁德市2021-2022学年高一下学期期末质量检测数学试题