如图,正方体
的棱长为a,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/799a4d01-5b96-4a7e-af5f-75ce125c4607.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/799a4d01-5b96-4a7e-af5f-75ce125c4607.png?resizew=161)
A.若点M在线段![]() ![]() |
B.若点M在线段![]() ![]() |
C.若点M在线段![]() ![]() ![]() |
D.若点M是正方体表面上的动点,则满足![]() ![]() |
更新时间:2021-07-10 15:31:59
|
相似题推荐
多选题
|
适中
(0.65)
解题方法
【推荐1】折纸是一种高雅的艺术活动.已知正方形纸片
的边长为2,现将
沿对角线
旋转
,记旋转过程中点
的位置为点
中点分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc80e4a57521af0b402d92b3408d22c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5df92548825892c451cc423389ba63.png)
A.![]() |
B.![]() ![]() |
C.旋转过程中,![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
【推荐2】如图,棱长为1的正方体
中,
为线段
上的动点(不含端点),下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/49e34e80-1f15-4bc8-af05-2842ed9ad540.png?resizew=247)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/49e34e80-1f15-4bc8-af05-2842ed9ad540.png?resizew=247)
A.三棱锥![]() |
B.平面![]() ![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.平面![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
【推荐1】已知正方体
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.直线![]() ![]() | B.直线![]() ![]() |
C.直线![]() ![]() | D.直线![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
解题方法
【推荐2】在棱长为1的正方体
中,点
满足
,
,
,则以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a994f225e1e2664be9709af8ead285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee72261f6901e62dfd0ffe547406544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e2e01346f60857ff635bb766802e57.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】在长方体
中,
,点
在底面
的边界及其内部运动,且满足
,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/ef6197e1e8a79838a2692950d0ff1d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b3cb4c667b4e6d0e14922e552ac95b.png)
A.若点![]() ![]() ![]() |
B.点![]() ![]() ![]() |
C.若点![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,等边三角形
的边长为4,
为边
的中点,
于
.将
沿
翻折至
的位置,连接
.那么在翻折过程中,下列说法当中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/3eaa320d-fb24-4803-9013-574f530ac602.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b84c9d873289f99d8eb733d12899280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/3eaa320d-fb24-4803-9013-574f530ac602.png?resizew=194)
A.![]() |
B.四棱锥![]() ![]() |
C.存在某个位置,使![]() |
D.在线段![]() ![]() ![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
解题方法
【推荐3】中国古代数学著作《九章算术》中,记载了一种称为“曲池”的几何体,该几何体的上下底面平行,且均为扇环形(扇环是指圆环被扇形截得的部分),现有一个如图所示的曲池,它的高为2,
,
,
,
均与曲池的底面垂直,底面扇环对应的两个圆的半径分别为1和2,对应的圆心角为90°,则以下命题正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/31/2991301223555072/2993157765718016/STEM/c17b21ad-7db8-4990-8fde-6d88f4ccf0c8.png?resizew=137)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2022/5/31/2991301223555072/2993157765718016/STEM/c17b21ad-7db8-4990-8fde-6d88f4ccf0c8.png?resizew=137)
A.![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() |
C.弧![]() ![]() ![]() |
D.以![]() ![]() ![]() |
您最近一年使用:0次