设集合U={1,2,3,4},M={1,2,3},N={2,3,4},则∁U(M∩N)( ) 设集合U={1,2,3,4},M={1,2,3},N={2,3,4},则∁U(M∩N)( ) 发布时间:2024-03-31 11:19:16