题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003650-40625.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003650-36617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003650-52626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003650-70319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-69770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-96942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-63083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-75862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-68445.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003650-70319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-69770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-96942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003652-37494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003652-38742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003652-14617.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-63083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-75862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003651-68445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003652-84752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003652-43655.png)
核心考点
举一反三
①回归方程
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003645-83176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003645-38602.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003645-51176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003646-53679.gif)
②已知平面
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003646-42493.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003646-52174.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003646-79747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003646-12266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003647-99772.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003647-38039.gif)
③“若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003647-17937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003647-83965.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003647-43240.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003647-28466.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003648-56979.gif)
④若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003648-61899.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003648-72174.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003648-75964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003648-79693.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003649-31232.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003649-50119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003642-36435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003643-55997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003643-47308.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-86990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-35284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-90070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-97421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-90070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-90070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003626-95175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-90070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003625-90070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003626-31515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003626-26297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003626-31769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003626-31515.png)
A. 1 | B. 2 | C. 3 | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815003618-55151.png)
A.a∈A | B.a![]() | C.{a}∈A | D.a?A |
A.1个 | B.2个 | C.3个 | D.4个 |
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