已知正方体
中,M,N分别为
,
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
A.直线MN与![]() ![]() | B.平面![]() ![]() ![]() |
C.在![]() ![]() | D.在![]() ![]() ![]() |
2024·山东临沂·二模 查看更多[2]
更新时间:2024-05-31 11:32:35
|
相似题推荐
单选题
|
较难
(0.4)
名校
【推荐1】如图,圆台
的上、下底面圆半径分别为1、2,高
,点S、A分别为其上、下底面圆周上一点,则下列说法中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac774789474bbc432de4d75479506a31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/15d9f92b-5bbd-47f7-8687-b3857c009030.png?resizew=182)
A.该圆台的体积为![]() |
B.直线SA与直线![]() ![]() |
C.该圆台有内切球,且半径为![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
解题方法
【推荐2】如图所示的四棱锥
中,底面
与侧面
垂直,且四边形
为正方形,
,点
为边
的中点,点
在边
上,且
,过
,
,
三点的截面与平面
的交线为
,则异面直线
与
所成的角为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/a9f49858-26f1-426c-a512-6037dc29df38.png?resizew=188)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71eda790a2fb0131ef2cac2763c84d99.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cd0e29f4f800b5be77d7ccb5cfed24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/a9f49858-26f1-426c-a512-6037dc29df38.png?resizew=188)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
解题方法
【推荐1】如图,正方体
的棱长为1,线段
上有两个动点
,且
,则当
移动时,下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/6df752d0-8791-4c9f-969c-fbf19a8d6a9f.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ddbb49c644bf06ccbad885ba2c84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db26fcb4380a58ac02012e836e47d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa7d487586e3702f55cd2d6466654bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9960e8ac8a93538a6c08b6a0cee4e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa7d487586e3702f55cd2d6466654bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/6df752d0-8791-4c9f-969c-fbf19a8d6a9f.png?resizew=143)
A.![]() ![]() |
B.四面体![]() |
C.三棱锥![]() |
D.异面直线![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
名校
解题方法
【推荐2】在四棱锥
中,
,过直线
的平面将四棱锥截成体积相等的两个部分,设该平面与棱
交于点E,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cb4fa917a0f00684c83900a4e3a1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90ba7c74f0a6e3ac264086f6dd00259.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
名校
【推荐1】在棱长为
的正方体
中,
是线段
上的点,过
的平面
与直线
垂直,当
在线段
上运动时,平面
截正方体
所得的截面面积的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](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/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
名校
【推荐2】正方体
的棱长为3,点E,F分别在棱
上,且
,
,下列几个命题:
①异面直线
与
垂直;
②过点B,E,F的平面截正方体,截面为等腰梯形;
③三棱锥
的体积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
④过点
作平面
,使得
,则平面
截正方体所得的截面面积为
.
其中真命题的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca280e104ed71b4bf4646c8845df6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1916d2aa3b9a7d351c6389ed75cbd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9f6d0396928eb0154373244c9aae74.png)
①异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
②过点B,E,F的平面截正方体,截面为等腰梯形;
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5a44046c8232c8b81924036c6ba9ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
④过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c297eb80dce2764c2ba045fdee42bab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042179f50ab26493ce2505fa898c35d.png)
其中真命题的序号为( )
A.①④ | B.①③④ | C.①②③ | D.①②③④ |
您最近一年使用:0次
单选题
|
较难
(0.4)
解题方法
【推荐1】如图,在正方体ABCD-EFGH中,P在棱BC上,BP=x,平行于BD的直线l在正方形EFGH内,点E到直线l的距离记为d,记二面角为A-l-P为θ,已知初始状态下x=0,d=0,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/5bc4403c-5cbf-4529-b8ec-caa32309d4f8.png?resizew=294)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/5bc4403c-5cbf-4529-b8ec-caa32309d4f8.png?resizew=294)
A.当x增大时,θ先增大后减小 | B.当x增大时,θ先减小后增大 |
C.当d增大时,θ先增大后减小 | D.当d增大时,θ先减小后增大 |
您最近一年使用:0次
单选题
|
较难
(0.4)
解题方法
【推荐2】如图所示,在正三棱台
中,
,记侧面
与底面
,侧面
与侧面
,以及侧面
与截面
所成的锐二面角的平面角分别为
,
,
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/58c743fd-abba-4906-b8cd-8269902e59f9.png?resizew=215)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509ed0938db57f55dd004bba809ca413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/58c743fd-abba-4906-b8cd-8269902e59f9.png?resizew=215)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次