1 . 如图,
是由具有公共直角边的两块直角三角板组成的三角形,
,
.现将
沿斜边
翻折成△
不在平面
内).若
,
分别为
和
的中点,则在
翻折过程中,下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/10/6/2823392083378176/2823649786617856/STEM/7eeecffd065f4fc99a2e46f136220854.png?resizew=433)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a774802d0ebfb545c4acbde42f5a1f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c016262f7c32817de8cb270fc9244f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ce5d6ca24e249f7172e51c154509b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c16811769709d1d41760548842fcbf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/2021/10/6/2823392083378176/2823649786617856/STEM/7eeecffd065f4fc99a2e46f136220854.png?resizew=433)
A.![]() ![]() |
B.![]() ![]() |
C.二面角![]() ![]() |
D.直线![]() ![]() ![]() |
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2021-10-06更新
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4卷引用:江苏省扬州市邗江区蒋王中学2021-2022学年高三上学期第一次检测数学试题
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