题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005335-45147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005335-81545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005336-27099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005336-28474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005335-81545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005336-40669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005336-24640.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:如图,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005337-45891.png)
不妨
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005337-38093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005337-40960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005338-50122.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005338-27712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005338-75326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005338-17079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005336-40669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005336-24640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005338-86623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005339-45358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005339-19553.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005330-81816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005330-49941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005330-93245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005330-27468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005331-94503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005331-49349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005331-64257.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005321-27786.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005321-72402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005322-82046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005322-49718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005243-12086.jpg)
(1).求证:D1E⊥A1D;
(2).在线段AB上是否存在点M,使二面角D1-MC-D的大小为
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005244-88886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005239-70274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005239-99366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005239-98662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005240-48715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022005240-65183.png)
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