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已知全集U=|1,2,3,4,5|,且A={2,3,4},B={1,2},則(CUB)等於A.{2}     ...
問題詳情:已知全集U=|1,2,3,4,5|,且A={2,3,4},B={1,2},則(CUB)等於A.{2}                          B.{5}                          C.{3,4}          ...
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