题目
题型:不详难度:来源:
① 非零向量
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101426-68051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101426-44789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101426-54414.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101426-74095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101427-82834.png)
② 已知非零向量
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101426-68051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101427-21871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101426-68051.png)
③ 命题“在三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101427-72456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101427-71605.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101428-48865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101428-74036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101428-21169.png)
④ 若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101428-13410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101428-74036.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101429-58338.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101429-83817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101429-64206.png)
核心考点
试题【给出下列命题,其中正确的命题是 (写出所有正确命题的编号).① 非零向量满足,则与的夹角为;② 已知非零向量,则“”是“的夹角为锐角”的充要条件;③ 】;主要考察你对四种命题等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101406-17689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101336-74927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101336-86319.png)
A.![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101322-64458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101322-97436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101322-64458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101322-97436.png)
① 若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101322-88427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101323-10898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101323-35789.png)
② 若关于
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101323-22456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101323-28625.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101324-69323.png)
③ 若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101324-82062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101323-22456.png)
A.0个 | B.1个 | C.2个 | D.3个 |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101316-38014.png)
①A={0,1)的子集有3个;
②“若am2 <bm2,则a<b”的逆命题为真;
③“命题p
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101306-69537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101306-13218.png)
④命题“
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101306-60792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101306-37551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101307-82721.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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