如图,在四棱锥P—ABCD中,底面ABCD是边长为2的正方形,
为正三角形,平面PAD
平面ABCD,点E为底面ABCD的中心,点F为线段PA上的动点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644632306155520/2646537928753152/STEM/2ecc651bf5694c9bb2fb37f6d56aa8e3.png?resizew=220)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644632306155520/2646537928753152/STEM/2ecc651bf5694c9bb2fb37f6d56aa8e3.png?resizew=220)
A.![]() |
B.存在点F,使得![]() |
C.存在点F,使得![]() |
D.存在点F,使得直线CF与直线PE为异面直线 |
20-21高二上·广东深圳·期末 查看更多[2]
广东省深圳市光明区2020-2021学年高二上学期期末数学试题(已下线)卷14 选择性必修第一册高二上期中考试 总复习检测5(难)-2021-2022学年高二数学单元卷模拟(易中难)(2019人教A版选择性必修第一册+第二册)
更新时间:2021-01-29 13:38:06
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【推荐1】在棱长为a的正方体
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A.![]() |
B.直线![]() ![]() |
C.线段![]() ![]() |
D.三棱锥![]() ![]() |
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【推荐2】如图,正方体
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A.F是轨迹长度为![]() |
B.![]() ![]() |
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A.在翻折过程中,存在某个位置,使得![]() |
B.在翻折过程中,存在某个位置,使得![]() |
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D.在翻折过程中,直线![]() ![]() ![]() |
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A.点![]() ![]() |
B.存在![]() ![]() |
C.直线![]() ![]() ![]() |
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A.三棱锥![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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