题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031128-25843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031128-84728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031128-15150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031129-55372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031129-45754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031129-81198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031129-36531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031130-57337.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:连接
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031131-58032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031131-97873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031131-23632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031131-39892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031132-48995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031132-23409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031131-23632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031132-42691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031132-42691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031132-63937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031132-76972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031133-45280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031133-22816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031133-19829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031133-54345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031130-35457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031134-33889.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031122-91933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031123-92258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031123-61225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031123-18708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031123-93144.png)
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-26868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-16307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-52676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-16364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-68780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-14840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-45494.jpg)
(1)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-69856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-24993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031110-82722.png)
(2)点
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031111-31539.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031111-85243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031111-85243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031111-95557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031111-80903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031111-86078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-69835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-60273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-94265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-60273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-20780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-77687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-50980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-92019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-42672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031055-16938.png)
(Ⅰ)试在棱
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031055-63581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031055-47144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031055-89855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031056-85031.png)
(Ⅱ)若动点
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031056-26745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031054-60273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031056-38502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031056-26745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031056-98601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-53316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-28041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-83413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-53316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-11279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-95771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-28041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-29085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031037-77474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-28041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031036-83413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031037-11741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031037-46463.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031037-85782.png)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031037-13017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031023-51166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031023-82847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-95558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-22005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-95438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-33786.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-77380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031023-51166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-60566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-78000.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-94515.png)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-43160.png)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031025-46409.png)
(3)求四棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031025-87353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106031024-95558.png)
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