名校
解题方法
1 . 在棱长为1的正方体
中,下列结论正确的选项是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.内切球与外接球体积之比为![]() |
B.若![]() ![]() ![]() |
C.若正四面体的4个顶点恰好在正方体的顶点,则正四面体的体积与正方体的体积之比为![]() |
D.正方体的各面所在平面将空间分成27部分 |
您最近一年使用:0次
名校
解题方法
2 . 已知正方体
的棱长为4,点E,F,M分别是BC,
,
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
A.直线![]() | B.四面体![]() ![]() |
C.三棱锥![]() ![]() | D.平面![]() |
您最近一年使用:0次
2023-04-18更新
|
703次组卷
|
3卷引用:陕西省西安市长安区第一中学2022-2023学年高一下学期期中数学试题
名校
3 . 如图,正方形
的边长为2,
为
的中点,将
沿
向上翻折到
,连接
,
,
为
的中点,在翻折过程中( )
![](https://img.xkw.com/dksih/QBM/2022/7/18/3025088080814080/3026862933565440/STEM/8ed2477c08464d80a2b72c609a987e74.png?resizew=243)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09a769a75b107390b9eeccc929f761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5ce18bd53a3c705a7c8a5bb88d2ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2022/7/18/3025088080814080/3026862933565440/STEM/8ed2477c08464d80a2b72c609a987e74.png?resizew=243)
A.四棱锥![]() ![]() |
B.![]() ![]() |
C.三棱锥![]() ![]() |
D.直线![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-07-20更新
|
1245次组卷
|
3卷引用:陕西省咸阳市实验中学2022-2023学年高一下学期第三次月考数学试题