解题方法
1 . 如图,在正方体
中,点O为线段BD的中点,点P在线段
上,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/ad30fe3e-3883-4b16-8f43-d93dd44b990c.png?resizew=150)
A.![]() ![]() |
B.平面ABD与平面![]() ![]() |
C.当点P是线段![]() ![]() ![]() |
D.当点P与点C重合时,点P到平面![]() |
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解题方法
2 . 下列命题中,正确的是( )
A.两条不重合直线![]() ![]() ![]() ![]() ![]() |
B.直线![]() ![]() ![]() ![]() ![]() |
C.两个不同的平面![]() ![]() ![]() |
D.直线![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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解题方法
3 . 已知
四棱锥的底面是菱形,
,
,
平面
,
,
分别为
,
的中点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5a86745bfe1dfe7bc2683811210330.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
A.E,F,B,C四点共面 | B.![]() ![]() |
C.![]() | D.直线![]() ![]() ![]() |
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