设集合A={1,2,3,5,7},B={3,4,5},则A∪B=( ) A.{1,2,3,4,5,7} B.{3,4,5} C
设集合A={1,2,3,5,7},B={3,4,5},则A∪B=()A.{1,2,3,4,5,7}B.{3,4,5}C.{5}D.{1,2}...
设集合A={1,2,3,5,7},B={3,4,5},则A∪B=( ) A.{1,2,3,4,5,7} B.{3,4,5} C.{5} D.{1,2}
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