题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021342-96684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-63264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-95164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-73799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-37045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-18323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021344-31590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021344-70741.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021344-70583.png)
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-73799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021345-83400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021345-58785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-73799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-37045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-18323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021343-63264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021345-28648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021345-89887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021346-35040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021346-16394.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021346-33426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021346-32718.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021321-52639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021322-87093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021322-12747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021322-21266.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021322-98889.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021323-98640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021323-85835.png)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021323-41593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021322-87093.png)
(Ⅱ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021324-38046.png)
(Ⅲ)棱
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021324-80685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021324-70394.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021324-69765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021325-42742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021325-16781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021325-46058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-50943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-30574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-93540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-16182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-21308.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-50943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-49954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021316-60809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021316-29784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-50943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-49954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-50943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-93540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-49954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-93540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021316-62387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-50943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-49954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-30574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021316-62649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-30574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-16182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021314-50943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021315-49954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021303-27840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021303-85901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021303-74343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021303-46289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021304-62404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021304-18336.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021304-31382.png)
(2)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021304-34807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021303-85901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021248-27377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021249-89974.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021249-48419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021249-62155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021249-82344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021249-86652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021249-78537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021250-99293.jpg)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021250-46766.png)
(Ⅱ)求三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021250-23226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021240-88039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021240-92102.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021240-49845.png)
(2)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106021240-65814.png)
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