如图在正方体
中,E为线段
上的动点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/7c11c01e-5022-4346-a7cc-3b73f364d04c.png?resizew=164)
A.![]() |
B.平面![]() ![]() |
C.线段![]() ![]() ![]() |
D.正方体内切球和外接球的半径比为1:2 |
更新时间:2023-07-10 23:06:20
|
相似题推荐
多选题
|
适中
(0.65)
解题方法
【推荐1】已知正方形
的边长是2,点
、
分别是边
,
的中点,将该正方形沿对角线
折起,得到三棱锥
,则在折起的过程中,以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
A.异面直线![]() ![]() |
B.存在某个位置,使得直线![]() ![]() |
C.当平面![]() ![]() ![]() ![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
【推荐2】已知圆台的上、下底面直径分别为2,6,高为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
A.该圆台的体积为![]() |
B.该圆台外接球的表面积为![]() |
C.用过任意两条母线的平面截该圆台所得截面周长的最大值为16 |
D.挖去以该圆台上底面为底,高为![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
【推荐3】在四边形
中(如图1所示),
,
,
,将四边形
沿对角线
折成四面体
(如图2所示),使得
,E,F,G分别为棱
,
,
的中点,连接
,
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/2/9/2912751191162880/2918251202666496/STEM/e4228c62-0393-4128-969d-e3be922f50f3.png?resizew=272)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d239af265e1a97e1ecddf0912169ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b03bf58cba56d1b98a8a457982870b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3efda4fe26e7eb115a550f2b0a33677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc84671fd0f27587260cdbcc31e6d483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f55e782bb850851bb52a4dfa15edbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/2022/2/9/2912751191162880/2918251202666496/STEM/e4228c62-0393-4128-969d-e3be922f50f3.png?resizew=272)
A.![]() |
B.直线![]() ![]() ![]() |
C.C,E,F,G四点共面 |
D.四面体![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐1】如图,在正方体
中,
,点
为线段
上的一动点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/df131c7d-ec7a-468b-8b9a-d7ee926a89eb.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/df131c7d-ec7a-468b-8b9a-d7ee926a89eb.png?resizew=177)
A.![]() |
B.三棱锥![]() |
C.当点P与点![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐2】在长方体
中,
,动点P满足
,
,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f7ad41c55fab640a159a08a12c6b03c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c17994d49afe725871b0065befd92a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4caeb095e0f8caf72f7067c8d33556.png)
A.当![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐1】如图,PA垂直于以AB为直径的圆所在平面,C为圆上异于A,B的任意一点,
垂足为E,点F是PB上一点,则下列判断中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/71dd1baa-03e0-43c0-aec7-991db8c1b1e0.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/71dd1baa-03e0-43c0-aec7-991db8c1b1e0.png?resizew=184)
A.![]() | B.![]() | C.![]() | D.平面![]() |
您最近一年使用:0次
【推荐2】已知正方体
的棱长为2,点
分别是棱
的中点,点
在四边形
内(包括边界)运动,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da62d9c339d604c5ffafc82fc54e2b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.存在点![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次