题目
题型:单选题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-55883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-23992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-46115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-73068.png)
①对任意平面点集
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-73068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-73068.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-97807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-19124.png)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-81888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-90124.png)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-51011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-73068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-73068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-31456.png)
其中正确命题的序号为( )
A.①② | B.②③ | C.①④ | D.③④ |
答案
解析
试题分析:对命题①,对任意平面点集
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-62972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-31448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-66139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-63717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075207-41892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-19124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075208-26069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075208-76386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-57659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-55883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075206-46115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075208-77864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075208-94946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075208-10035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075208-77864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075209-61520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075209-43190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075209-20369.png)
核心考点
试题【若平面点集满足:任意点,存在,都有,则称该点集是“ 阶稳定”点集.现有四个命题:①对任意平面点集,都存在正数,使得是“ 阶稳定”点集;②若,则是“ 阶稳定”点集】;主要考察你对集合运算等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075159-77973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075159-61495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075200-27791.jpg)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075156-87165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075156-18641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075156-91939.png)
①2014
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075157-96052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075157-66584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075157-24105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075157-98139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075157-10508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075158-84854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075157-98139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075158-97771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075154-95653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075154-67990.png)
A.M=P | B.(CUM)![]() ![]() | C.P![]() | D.M![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075149-13971.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075150-40731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075150-29841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075150-25570.png)
A.{-1,![]() | B.{-1,![]() | C.{1,![]() | D.{![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075144-46144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075144-26670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817075144-53033.png)
A.-![]() | B.2或-1 | C.-2或1或0 | D.-![]() |
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