设集合A={1,2,3,5,7},B={3,4,5},则A∪B=( ) A.{1 发布时间:2017-04-03 22:12 │ 来源:www.tikuol.com 题型:选择题 问题: 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}