题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-33695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-54408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-20596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-75331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-37405.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:根据题意,由于
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-33695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-54408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-20596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-75331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050235-80905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-37405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050234-37405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050235-94104.png)
点评:主要是考查了向量的共线的概念的运用,属于基础题。
核心考点
试题【,,且,则锐角为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
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050230-43040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050230-40451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050230-93740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050225-11685.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050225-34210.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050226-48557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050226-64505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050226-75510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050217-78800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050217-83932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050218-55745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050218-12367.png)
A.![]() | B.![]() | C.3 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050209-48456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050210-22006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050209-48456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050210-22006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050210-22006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050209-48456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050210-22006.png)
A.30° | B.60° | C.150° | D.120° |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050202-12138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050202-91762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050202-56066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050202-38208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050203-84761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050203-77798.png)
(Ⅰ)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050203-73426.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050203-74904.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050202-12138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050204-94068.png)
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