题目
题型:单选题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105036-40233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105036-96532.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105036-68530.png)
A
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105037-36346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105037-23687.png)
C
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105037-70960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105038-61495.png)
答案
解析
由
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105038-95002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105038-78357.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105038-92949.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105038-50127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105039-73373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105039-51706.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105039-45530.png)
故正确答案为A
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105032-36509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105032-33219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105032-68415.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105028-47580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105029-47309.png)
A.{4} | B.{3,4} | C.{2,3,4} | D.{1,2,3,4} |
若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105012-73931.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105012-14794.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105013-38921.gif)
①
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105013-39402.gif)
②对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105013-13882.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105013-79429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105013-86193.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-23925.gif)
则称集合组
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105012-73931.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-52591.gif)
如图,作
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-50021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-74232.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-56882.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105015-74981.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105015-13393.gif)
![]() | ![]() | … | ![]() |
![]() | ![]() | … | ![]() |
… | … | … | … |
![]() | ![]() | … | ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105017-90126.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-52591.gif)
集合组1:
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105017-20544.gif)
集合组2:
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105017-30083.gif)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105017-69879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105018-71760.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-52591.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105018-58403.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105018-71760.gif)
(Ⅲ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105018-57118.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105018-48476.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105014-52591.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105018-32334.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105019-61913.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105019-77398.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105019-61737.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105008-51905.png)
A.“集合”的下位 |
B.“含义与表示”的下位 |
C.“基本关系”的下位 |
D.“基本运算”的下位 |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105001-40303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105001-69551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105001-18558.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105002-62943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105002-39634.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105002-22593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105003-99895.png)
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