题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062353-39848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062354-24552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062354-12829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062354-62432.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062354-68546.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062355-10826.png)
B.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062355-18447.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062355-72864.png)
D.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062355-20524.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062356-17240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062356-18693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062356-60293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062356-14515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062357-70014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062357-81745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062357-78820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062358-45593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062358-99052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062358-37127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062356-18693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062359-60039.png)
核心考点
试题【设为三角形的重心,角A、B、C的对边分别为a、b、c,若,则角B的大小为( )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
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062348-35869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062349-79624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062348-35869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062349-79624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062348-35869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062349-79624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062348-35869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062348-35869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062349-79624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062342-12240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062342-63847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062343-80281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062343-35948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062343-39531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062344-44449.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062339-73505.png)
A.30° | B.45° | C.90° | D.135° |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062334-13390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062335-78881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062335-38319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062335-20362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062328-43549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062328-94958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062329-43162.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104062329-56384.png)
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