已知全集U=1,2,3,4,5,6,7,8,M=1,3,5,7,N=5,6,7,则= 发布时间:2017-12-29 18:33 │ 来源:www.tikuol.com 题型:单项选择题 问题: 已知全集U=1,2,3,4,5,6,7,8,M=1,3,5,7,N=5,6,7,则=().A.5,7B.2,4C.2,4,8D.1,3,5,6,7