题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-46771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-92777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-23036.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
由
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-87675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-65823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-42768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-42768.png)
又当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-95202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-52941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-65823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-42647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-65823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-89422.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-78902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-29891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-25753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-25753.png)
又当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201934-95202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-14468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-29891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-42647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-29891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-35739.png)
即有当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-42647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-89422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201935-35739.png)
故正确答案为B
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201933-15282.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201933-15005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201932-74058.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201932-24518.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201932-10999.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201927-55090.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201928-37701.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201928-31883.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201928-66134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201928-85664.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201929-36468.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-35578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-50066.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-72159.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-94963.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-22721.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-50066.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-49037.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-55436.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201927-70646.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201926-49037.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201927-28080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201927-55576.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201925-57016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201925-56269.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201925-37631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819201925-95880.gif)
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