a |
|a| |
b |
|b| |
ab |
|ab| |
A.A⊆B | B.A⊇B | C.A=B | D.A∩B={-1} |
|a| |
a |
|b| |
b |
|ab| |
ab |
|a| |
a |
|b| |
b |
|ab| |
ab |
|a| |
a |
|b| |
b |
|ab| |
ab |
|a| |
a |
|b| |
b |
|ab| |
ab |
|a| |
a |
|b| |
b |
|ab| |
ab |
A.集合B的任何一个元素都属于A |
B.集合B的任何一个元素都不属于A |
C.集合B中至少有一个元素属于A |
D.集合B中至少有一个元素不属于A |
A.α⇒β | B.β⇔α | C.β⇒α | D.α≠>β |
A.2 | B.-1 | C.2或-1 | D.4 |
© 2017-2019 超级试练试题库,All Rights Reserved.