题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020911-51539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020911-30227.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020911-57143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020911-33972.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020912-46141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020912-62185.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020912-98028.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020912-48118.gif)
解析
核心考点
试题【在平行四边形中,已知,,,E为的中点,则 】;主要考察你对平面向量的基本定理及坐标表示等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020905-10603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020905-36364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020905-81844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020905-16734.png)
能的位置区域用阴影表示正确的是 ( )
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020906-54324.png)
OC、OB与OC的夹角都为30°,且∣OA∣=∣OB∣="1," ∣OC∣=
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020858-58838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020858-64418.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020858-32346.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020858-38507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020859-36079.png)
A.2 B.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020858-58838.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020859-59135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020853-55278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020853-57929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020853-82697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020854-22572.png)
A.2 | B. 0 | C.![]() | D.-2 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020848-72264.png)
A.3 | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020841-73637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020841-58351.png)
的射影分别是O1和A1,若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020842-95481.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104020841-73637.png)
A.![]() | B.-![]() | C.2 | D.-2 |
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