题目

已知全集U={x∈N*|x<9 },集合∁U(A∪B)={1,3},A∩∁UB={2,4},则集合B等于(   )    A．{1,3,5,6,7,8}   B． {2,4,5,6,7,8}   C． {5,6,7,8}   D． {1,2,3,4}  答案：C

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