题目
题型:单选题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033306-50271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033306-84269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033306-99237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033306-71905.png)
A.![]() |
B.![]() |
C.![]() |
D.R |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033307-75628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033307-78998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033308-89038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033308-49374.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033308-97822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033308-31045.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033302-33332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033302-34289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033302-67765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033302-76973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033302-86175.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033257-24983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033257-28635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033258-39334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033258-76636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033255-68024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033255-10205.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033251-92830.png)
A.[1,2) |
B.[1,2] |
C.[1,+∞) |
D.[2,+∞) |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033247-43111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033247-42695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033247-42695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033247-84718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818033248-15569.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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