题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013420-29479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013420-75234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013421-62258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013421-85859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013421-94084.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
![]() |
在长方体
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013420-29479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013420-75234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013422-30145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013422-47382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013423-40014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013423-17576.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013423-98104.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013423-83476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013423-41876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013424-49870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013424-60388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013421-85859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013421-94084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013424-88038.png)
核心考点
举一反三
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013413-56664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013414-98598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013414-80549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013414-46690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013414-20950.png)
在如图所示的多面体中,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013353-71229.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013353-39603.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013353-66834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013354-53951.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013354-87374.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013354-59232.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013354-23923.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013354-40671.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013355-42679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013355-11941.gif)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013355-71637.gif)
(2)求平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013355-49723.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013356-93760.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013356-93769.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
A.30° | B.45° | C.90° | D.60° |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013342-70270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022013338-13430.gif)
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