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1 . 菱形ABCD的边长为4,∠A=60°,E为AB的中点(如图1),将
ADE沿直线DE翻折至
处(如图2),连接
,
,下列说法中正确的有( )
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848359063805952/2850594040209408/STEM/3fc42cd5fc10453d87cf962c09ae6269.png?resizew=432)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848359063805952/2850594040209408/STEM/3fc42cd5fc10453d87cf962c09ae6269.png?resizew=432)
A.在翻折的过程中(不包括初始位置),平面![]() ![]() |
B.若F为![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2021-11-15更新
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535次组卷
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2卷引用:云南师范大学附属中学2021-2022学年高二上学期期中考试数学试题