题目
题型:不详难度:来源:
①
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062818-79821.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062818-43367.png)
③设集合
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062818-15450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062819-55307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062819-58554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062819-43249.png)
④
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062819-20711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062820-98563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062820-52606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062820-74915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062820-28108.png)
其中正确的判断个数是:( )
A.1 | B.2 | C.3 | D.4 |
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062821-89910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062821-16050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062821-99768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062821-16935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062822-57412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062822-45864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062822-49329.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062822-83743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062822-83743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062822-45864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062820-74915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062823-72703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062823-25537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062820-28108.png)
核心考点
试题【给出如下四个判断:①;②;③设集合,,则“”是“”的必要不充分条件;④ ,为单位向量,其夹角为,若,则.其中正确的判断个数是:( )A.1B.2C.3D.4】;主要考察你对四种命题等知识点的理解。[详细]
举一反三
①
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062807-46757.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062808-29432.png)
③设
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062808-61950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062808-38818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062808-11294.png)
④命题“若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062808-48260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062809-75060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062809-66682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062809-30234.png)
其中正确的判断个数是:
A.1 | B.2 | C.3 | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062728-80511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062728-80511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062715-95251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062716-49359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062716-10911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-50698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-98328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-56522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-71213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062710-69947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062710-45017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-50698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-56522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-50698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102062709-56522.png)
A.“![]() ![]() |
B.“![]() ![]() ![]() ![]() |
C.若“![]() ![]() |
D.若随机变量![]() ![]() ![]() ![]() |
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