点
是正方体
中侧面正方形
内(含边界)的动点,正方体棱长为1,则下面结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
A.满足![]() ![]() ![]() |
B.点![]() ![]() ![]() |
C.在线段![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
更新时间:2022-10-12 10:47:51
|
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【推荐1】如图所示,该多面体是一个由6个正方形和8个正三角形围成的十四面体,所有棱长均为1,所有顶点均在球
的球面上.关于这个多面体给出以下结论,其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/6d6ba755-f66d-490a-8088-84d5c11795e2.png?resizew=170)
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A.![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.该多面体的体积为![]() |
D.该多面体的外接球的表面积为![]() |
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【推荐2】如图所示正方体
,下面正确结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/8f750cd6-f040-412f-be85-5c1b4536534d.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/8f750cd6-f040-412f-be85-5c1b4536534d.png?resizew=167)
A.![]() ![]() | B.![]() |
C.![]() ![]() | D.异面直线![]() ![]() ![]() |
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【推荐1】在棱长为2的正方体
中,
、
、
分别为
,
,
的中点,则下列选项正确的是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/9674dbc4-1aa9-4cac-9c8f-755263ff5f69.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/9674dbc4-1aa9-4cac-9c8f-755263ff5f69.png?resizew=176)
A.![]() |
B.直线![]() ![]() ![]() |
C.三棱锥![]() ![]() |
D.存在实数![]() ![]() ![]() |
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【推荐2】已知正方体
的棱长为1,点E,O分别是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6fd209384e1533e43bbb29adce0421d.png)
A.BE与![]() ![]() | B.点O到平面![]() ![]() |
C.平面![]() ![]() ![]() | D.点P到直线AB的距离为![]() |
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【推荐1】如图,在直三棱柱
中,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bffa825c5e2c744723b0c9ccbdfda0.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/fe7df3f8-4ff5-428c-9f11-284e46bf16a0.png?resizew=149)
A.![]() ![]() |
B.平面![]() ![]() |
C.异面直线![]() ![]() ![]() |
D.点![]() ![]() ![]() ![]() ![]() |
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【推荐2】如图,已知E,F分别是正方体
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A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() ![]() | D.二面角![]() ![]() |
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