名校
解题方法
1 . 在三棱锥
中,已知
底面ABC,
分别是线段
上的动点.则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/5b14b6ca-214d-443f-a329-950c41410391.jpg?resizew=222)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae78b4ac765e2cc07aa1b37e5402cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace5e8c3769ad8f370c86f879246c174.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/5b14b6ca-214d-443f-a329-950c41410391.jpg?resizew=222)
A.当![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
2022-12-20更新
|
537次组卷
|
2卷引用:安徽省六安第一中学2022-2023学年高三上学期第四次月考数学试题
2 . 如图,直三棱柱
中,
,
,
.点Р在线段
上(不含端点),则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/93a91b9a-97a1-49d9-8b55-44925a06366c.png?resizew=211)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af405392c66b86550a58f1cb9868717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/93a91b9a-97a1-49d9-8b55-44925a06366c.png?resizew=211)
A.不存在点![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
名校
解题方法
3 . 在正方体
中,M,N,P分别是面
,面
,面
的中心,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/48593459-97e1-4307-963f-da421bbb8092.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75d14708e6aa1404477db9d7e3166f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/48593459-97e1-4307-963f-da421bbb8092.png?resizew=159)
A.![]() | B.![]() ![]() ![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
2022-12-16更新
|
2150次组卷
|
7卷引用:T8(华师一附中、湖南师大附中等)2023届高三上学期第一次学业质量评价数学试题
解题方法
4 . 已知正四棱锥
的所有棱长都相等,
分别是侧面
,侧面
和底面
的中心,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd36104c7358ec5d86aa50b4b035642a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() | B.![]() ![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
名校
5 . 已知正方体
棱长为2,P为空间中一点,下列论述正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/217e681a-22fa-4d9e-b8fc-e6f214f21209.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/217e681a-22fa-4d9e-b8fc-e6f214f21209.png?resizew=163)
A.若![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2022-12-16更新
|
474次组卷
|
4卷引用:浙江省学军中学紫金港2022-2023学年高二上学期期中数学试题
6 . 已知空间四边形OABC的各边及对角线AC,OB的长度均相等,E,F分别为OA,BC的中点,则( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
7 . 如图,在边长为2的正方形
中,点
分别是
的中点,将
分别沿
折起,使
三点重合于点
,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/3f3908a8-41b0-4416-8689-384953078383.png?resizew=280)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d425d2d1745d40342453ef4d1ac14fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c094758c3e91f97a54bcc67441382864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/3f3908a8-41b0-4416-8689-384953078383.png?resizew=280)
A.![]() |
B.三棱锥![]() ![]() |
C.点![]() ![]() ![]() |
D.设![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-12-11更新
|
830次组卷
|
4卷引用:福建省莆田一中、龙岩一中、三明二中三校2023届高三上学期12月联考数学试题
福建省莆田一中、龙岩一中、三明二中三校2023届高三上学期12月联考数学试题湖南省长沙市第一中学2022-2023学年高二下学期入学考试数学试题(已下线)8.6.2直线与平面垂直的性质定理(第2课时)(精练)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)江苏省南京市第二十九中学2022-2023学年高三下学期4月月考数学试题
名校
解题方法
8 . 如图,四棱柱
的底面ABCD是正方形,O为底面中心,
平面ABCD,
.以O为坐标原点,建立如图所示的空间直角坐标系,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/d1263f0e-492a-4648-b165-b336c4e79788.png?resizew=191)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/d1263f0e-492a-4648-b165-b336c4e79788.png?resizew=191)
A.![]() |
B.![]() ![]() |
C.平面![]() ![]() |
D.点B到直线![]() ![]() |
您最近一年使用:0次
2022-12-08更新
|
355次组卷
|
3卷引用:山东省泰安市2022-2023学年高二上学期期中考试数学试题
2022·全国·模拟预测
解题方法
9 . 如图,在三棱锥
中,
⊥
,
,D为AB的中点,且
为等边三角形,
,
,则下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/348f3c08-2545-4c4d-a8f6-361017125a73.png?resizew=183)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878287dcfc8c30ec0f5acad9225d2c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79482c6de6bbd05affc78f9c625e52f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02caf4bc34411e9de5ac61bd2560028.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/348f3c08-2545-4c4d-a8f6-361017125a73.png?resizew=183)
A.![]() |
B.平面![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2022·全国·模拟预测
解题方法
10 . 已知四面体
中,若
,
,
分别为棱
和棱
上的点(异于棱的端点),
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b141b00b53e9f4f85f18ac40d6ccbc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf271d6475f5305bc922677b4cfe28c.png)
A.![]() ![]() | B.![]() |
C.![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次