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设集合A={3,5,6,8},集合B={4,5, 7,8},则A∩B等于
(A){3,4,5,6,7,8} (B){3,6} (C) {4,7} (D){5,8}
A.[-1,4] B.[-1,4) C.{0,1,2,3} D.{1,2,3}