题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175719-23323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-38337.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-77104.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-58987.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-74380.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175721-32054.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175721-94258.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-94641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-91374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-14504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-73461.png)
A.30° | B.45° | C.135° | D.45°或135° |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-14704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-77186.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-96670.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-14704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-73871.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-33297.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-30553.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-24267.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-36420.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175640-73795.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175633-70053.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175633-36855.gif)
A.![]() | B.![]() ![]() ![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175615-85490.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175615-55119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175616-24806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175616-60399.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175616-37004.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175616-24127.gif)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175539-43686.gif)
(I)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175540-76348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175540-57574.gif)
(II)记
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175540-20912.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175548-44029.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175548-22234.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175549-94516.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175549-68758.gif)
且满足
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175549-75529.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175549-57573.gif)
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