在棱长为2的正方体
中,E、F、G分别为BC、
、
的中点,则下列选项正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/a498338a-105a-4a38-bc59-b5e6196c947a.png?resizew=208)
![](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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/a498338a-105a-4a38-bc59-b5e6196c947a.png?resizew=208)
A.![]() | B.直线![]() ![]() |
C.三棱锥![]() ![]() | D.![]() ![]() |
更新时间:2022-11-22 20:06:32
|
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【推荐1】已知在四棱锥
中,底面
为梯形,且
的交点为
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A.![]() | B.![]() |
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【推荐2】如图,在正三棱锥A-BCD中,底面△BCD的边长为4,E为AD的中点,AC⊥AB,则下列结论正确的是( )
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【推荐1】已知正方体
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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A.该正方体外接球的表面积是![]() |
B.若截面是正六边形,则直线![]() |
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D.若截面过![]() ![]() |
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【推荐2】如图,在正方体
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A.![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() |
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【推荐1】如图,E,F分别是正方体
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A.异面直线![]() ![]() |
B.异面直线![]() ![]() |
C.直线![]() ![]() |
D.直线![]() ![]() |
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【推荐2】如图所示,棱长为3的正方体
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A.![]() | B.![]() ![]() ![]() |
C.![]() | D.当![]() ![]() ![]() |
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