题目内容
已知全集U ={1,2,3,4,5,6,7,8},M ={1,3,5,7},N ={5,6,7},
则( M N )= ( )
则( M N )= ( )
A.{5,7} | B.{2,4} | C.{2.4.8} | D.{1,3,5,6,7} |
C
,所以( M N )=,所以选C
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题目内容
A.{5,7} | B.{2,4} | C.{2.4.8} | D.{1,3,5,6,7} |