![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
已知集合A={1,2,3},则下列哪一个不是A的真子集()
A.{1}
B.{2,3}
C.{1,2,3}
D.{1,3}
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、{1,2,3}
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.{1}
B.{2,3}
C.{1,2,3}
D.{1,3}
C、{1,2,3}
A.{1,2}
B.{5}
C.{1,2,3}
D.{3,4,6}
设有集合A={a,b,c},为空集,则下列哪一个表示是正确的?
(1){a)∈A;(2){a}A;(3)a
A;(4)
A.{0,1,2,3,4,6}
B.{1,2,3,4}
C.{2,4}
D.{2,4,6}
设集合A={1,2,3},B={2,3},C={1,3,4},则(A∩B)∪C等于
A.{1,2,3}
B.{1,2,4}
C.{1,3,4}
D.{1,2,3,4}