题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012853-62706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012854-66977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012854-23634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012854-28549.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:由向量平行的充要条件知
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012855-26262.png)
化简得
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012855-12881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012855-60314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012856-32440.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012856-46142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012856-47639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012856-79318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012854-28549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012857-62389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012856-47639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012857-33369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012857-88541.png)
核心考点
试题【设,,且,则锐角为( )A.B.C.D.】;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/20191104/20191104012848-41291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012848-48507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012848-11007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012848-62171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012849-42159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012849-60358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012840-37217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012840-43614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012840-73308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012841-67081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012841-88924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012841-98118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012841-29108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012842-15595.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012840-37217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012842-20307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012840-43614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012842-82021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012842-21174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012833-64711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012833-80984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012834-96189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012834-76571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012834-58864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012834-53993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012833-64711.png)
A.直角三角形 | B.钝角三角形 |
C.等边三角形 | D.等腰三角形但不是等边三角形 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012827-70782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012827-91461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012827-94722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012828-58617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012828-24033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012828-70208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012828-63097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012819-74569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012819-53052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012819-34479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012820-30759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012820-76151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012820-29674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012821-38639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012821-40388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012821-75487.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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