题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-91875.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-72886.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-93188.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-75421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-67903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-81071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-34768.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-75421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-47673.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-81071.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-79702.gif)
法2,如右图,将空间四边形放置到正方体中,由三垂线定理知①正确;由异面直线所成角知,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-75421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-67903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-61775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020944-37775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020944-47188.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-61775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020944-37775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-81071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020944-80318.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020944-67366.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020945-28074.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020942-75421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020943-47673.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020945-62384.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020937-14375.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020937-14375.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020937-14375.gif)
A.4条 | B.3条 | C.2条 | D.1条 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020929-61806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020930-69909.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020930-45096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020930-49955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020930-63202.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020930-11911.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020931-81058.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020931-27293.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020931-86151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020931-83460.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020922-70152.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020922-72456.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020922-41064.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020923-23730.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020912-46791.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020912-33466.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020912-72479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020913-70111.gif)
(3)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022020913-51953.gif)
A.30° | B.45° | C.60° | D.90° |
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