题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171347-59410.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171347-58705.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171347-36328.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171347-41850.gif)
上的两条切线,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171347-98771.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171348-93070.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171348-69143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171348-17241.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171348-91539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171349-73831.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171349-82833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171349-47139.jpg)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171349-16834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171350-15935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171350-52321.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171350-91605.gif)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171350-17468.gif)
所以当
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171350-68879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171351-67152.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171350-68879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171349-73831.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171351-52730.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171351-12712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171351-23159.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171351-67152.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171348-69143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171351-30697.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171352-78225.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171352-38910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171352-52378.gif)
核心考点
举一反三
(A)相交 (B)是异面直线 (C)平行 (D)可能是相交、平行或异面直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171335-66171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171336-92572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171336-92572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171336-19385.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171323-38021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171323-30993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171323-66214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171318-38132.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171319-18890.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171319-11387.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171319-88992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171319-49909.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171319-11387.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171313-32269.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171313-79280.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171314-18497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171314-76932.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022171314-25980.gif)
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