命题甲:x+y=3;命题乙:x=1或y=2,则命题甲是命题乙的( ) A.充分不 发布时间:2017-04-15 20:24 │ 来源:www.tikuol.com 题型:选择题 问题: 命题甲:x+y=3;命题乙:x=1或y=2,则命题甲是命题乙的( )A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分又不必要条件
题型:选择题 The number of people visiting the exhibition ______ 50, and a number of them ____ painters.A.was; wasB.were; wasC.was; wereD.were; were 查看答案