解题方法
1 . 如图1,直角梯形ABCD中,
,
,
,E为AD的中点,将△ABE沿BE折起,使二面角A-BE-C是直二面角,并连接AC,AD得到四棱锥A-BCDE,如图2.M,N分别是图2中BC,AD的中点则下列四个结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/12/9/2868750178287616/2870073774137344/STEM/5b0e196f-75bb-4e9c-96a6-a401bbb01de3.png?resizew=347)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a484306bac8576cf93aadae6b7ef84b.png)
![](https://img.xkw.com/dksih/QBM/2021/12/9/2868750178287616/2870073774137344/STEM/5b0e196f-75bb-4e9c-96a6-a401bbb01de3.png?resizew=347)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 如图,四边形
是边长为
的正方形,点
、
分别为线段
、
上的动点,
,将
翻折成
,且平面
平面
,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/12/9/2868672375586816/2868993859608576/STEM/f6501e57d18145d491c01386892afa27.png?resizew=340)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a3600b1760a63a10c9a0429b439dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f020ca4ad44801691235958e253907d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae27598851148e664c4af461f539356e.png)
![](https://img.xkw.com/dksih/QBM/2021/12/9/2868672375586816/2868993859608576/STEM/f6501e57d18145d491c01386892afa27.png?resizew=340)
A.存在点![]() ![]() |
B.当点![]() ![]() ![]() ![]() |
C.三棱锥![]() ![]() ![]() |
D.存在点![]() ![]() ![]() ![]() |
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3 . 在四棱柱
中,底面
是边长为1的正方形,
,则下列选项正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/3e15dc6b-3189-4b41-8b01-2b52a0cc481b.png?resizew=240)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32572d3ac12e715915fbd9cce5cb9ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/3e15dc6b-3189-4b41-8b01-2b52a0cc481b.png?resizew=240)
A.![]() | B.![]() |
C.若![]() ![]() | D.若直线![]() ![]() ![]() |
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4 . 已知
,
是两个不同的平面,
,
是两条不同的直线,如下四个命题中真命题为( )
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.若![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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5 . 如图,在四棱锥
中,底面
为菱形,
,
平面
,
,
为
的中点 ,若以
为坐标原点,以
、
的方向分别为
、
轴的正方向,建立如图所示的空间直角坐标系
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/28500ec5-88f5-47a3-88a2-4e97b248c97a.png?resizew=184)
![](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/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bae7599ad243c12d94325ad917f0a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd98a891fa65f2fc6688001b03185d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f654198c1e01d97f1378b35d7c68ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb95bd58ac46ef75bab8a2a3992b85b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/28500ec5-88f5-47a3-88a2-4e97b248c97a.png?resizew=184)
A.点![]() ![]() |
B.![]() |
C.![]() |
D.平面![]() ![]() |
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6 . 在长方体
中,
,
,
是线段
上的一动点,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() |
D.以![]() ![]() ![]() ![]() |
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解题方法
7 . 在正方体
中,
,E,F分别为
的中点,则下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/9150d322-f8e1-45a6-af0b-6977deff8a59.png?resizew=181)
![](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/d00bd0bd954971c2d9c9245763119a71.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/9150d322-f8e1-45a6-af0b-6977deff8a59.png?resizew=181)
A.![]() | B.![]() |
C.![]() | D.平面![]() ![]() |
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解题方法
8 . 以下命题正确的是( )
A.若![]() ![]() ![]() ![]() |
B.已知A,B,C三点不共线,对于空间任意一点O,若![]() |
C.已知![]() ![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() ![]() ![]() |
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9 . 给出下列命题,其中正确的是( )
A.若![]() ![]() ![]() |
B.对空间中任意一点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() |
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10 . 已知四面体ABCD的每个顶点都在球O(O为球心)的球面上,
为等边三角形,M为AC的中点,
,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a05e0ab55e325fb3b85fc8ca9c27c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
A.![]() | B.![]() |
C.O到AC的距离为![]() | D.二面角![]() ![]() |
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