已知集合A={1,3,5,7,9},B={2,3,4,7,10},则A∪B= A、{3,7}; B、{1,2,3,4,5,7,9,10}; C、{1,5,9}; D、{1,2,4,5,9,10} 发布时间:2025-05-13 10:34:35