题目内容
已知全集U={l,2,3·4,5,6,7},A={2,4,5),则=
A.{1,3,5,6,7} B.{1,3,4,6,7} C.(1,4,5,6,7} D.{1,3,6,7}
D
已知全集U={l,2,3,4,5},集合A={l,2,4},集合B={l,5},则( )
A.{2,4} B.{1,2,4} C.{2,3,4,5} D.{l,2,3,4,5}
已知全集U={l,2,3,4,5},集合A={l,2.4},集合B={l,5},则( )