题目
题型:不详难度:来源:
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答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044054-48990.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044055-91972.gif)
当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044054-48990.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044054-48990.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044055-55867.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044055-61304.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044055-43617.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044056-79119.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044056-39783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044056-90377.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044056-49550.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044057-89798.gif)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044056-41464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044056-49550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044054-48990.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044055-91972.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044041-63070.gif)
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