1 . 如图,等边三角形
的中线
与中位线
相交于
,已知
是
绕
旋转过程中的一个图形,下列命题中,正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/d5b2ce45-1f2a-4d26-9c85-bb57c90134b2.png?resizew=216)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145a3c51a65ece922205320a1c18a944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/d5b2ce45-1f2a-4d26-9c85-bb57c90134b2.png?resizew=216)
A.动点![]() ![]() ![]() |
B.恒有平面![]() ![]() |
C.三棱锥![]() |
D.旋转过程中二面角![]() ![]() |
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2020-03-20更新
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2卷引用:2020届海南华侨中学高三第五次月考数学试题