题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
试题分析:因为向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-21318.png)
|
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-21318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-21318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-21318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-21318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-97006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-98054.png)
又<
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065641-69212.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065640-30147.png)
点评:中档题,向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065638-89478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065639-54516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065641-37416.png)
核心考点
试题【已知向量、满足·(-)=0,且||=2||,则向量+2与的夹角为 ( )A.B.C.D.】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065634-53507.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065634-50032.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065630-94240.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065630-60806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065626-82635.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065626-70294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065626-91220.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065627-95527.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065627-95750.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065619-53470.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065619-60503.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065619-54110.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065620-16780.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065620-87377.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065620-36942.gif)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065610-55714.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065611-79460.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065611-45792.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065611-11817.gif)
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