题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011943-74904.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011943-66093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011944-95408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011944-36556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011944-19319.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011944-36556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011944-19319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011945-61582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011945-52405.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011931-34914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011931-58108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-91291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-65869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-81198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-26370.png)
(Ⅰ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-68693.png)
(Ⅱ)设点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-58059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-58059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-81198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-66016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-71758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-14918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011932-25426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011922-99793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011922-13969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011922-99793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011922-75805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011923-13309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011923-65108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011923-72941.png)
A.90° | B.60° | C.45° | D.30° |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011912-21351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011912-78445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011912-99285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011912-65469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011913-73013.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011907-78718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022011907-78718.png)
∠ACB=60°,则∠BCF等于 。
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