已知全集U={1,2,3,4,5,6,7,8,9},集合A={1,2,3,4,5,6},集合B={3,4,5,6,7,8},则集合?
已知全集U={1,2,3,4,5,6,7,8,9},集合A={1,2,3,4,5,6},集合B={3,4,5,6,7,8},则集合?UA∩?UB为()A.{3,4,5,6...
已知全集U={1,2,3,4,5,6,7,8,9},集合A={1,2,3,4,5,6},集合B={3,4,5,6,7,8},则集合?UA∩?UB为( )A.{3,4,5,6}B.{1,2,7,8,9}C.{1,2,3,4,5,6,7,8}D.{9}
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