问题:
满足条件A∪{0,1,2}={0,1,2,3}的所有集合A的个数是( )
A.6
B.7
C.8
D.16
满足条件A∪{0,1,2}={0,1,2,3}的所有集合A的个数是( )
A.6 | B.7 | C.8 | D.16 |
参考答案: