问题:
设集合 I={―2,―1,0,1,2}, A={1,2}, B={―2,―1,2},则 A (C I B)=( )
A.{0,1,2}
B.{1,2}
C.{2}
D.{1}
设集合 I={―2,―1,0,1,2}, A={1,2}, B={―2,―1,2},则 A (C I B)=( )
A.{0,1,2} | B.{1,2} | C.{2} | D.{1} |
参考答案: