题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-38870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-12131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-38153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-98480.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:因为,角
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-38870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-12131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073943-38153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073944-30880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073945-94371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073944-42270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073945-20412.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073935-71092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073935-36531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073936-56208.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073936-25267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073936-63978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073936-75984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073933-27771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073933-25813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073933-27771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073934-27651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073930-24189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073930-72450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073930-18396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073927-42597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073927-79918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073925-60635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073925-36961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073926-75747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821073926-62791.png)
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