下列各式①3x,②x+y5,③12-a,④xπ-2(此处π为常数)中,是分式的有 发布时间:2017-05-18 13:40 │ 来源:www.tikuol.com 题型:选择题 问题: 下列各式①3x,②x+y5,③12-a,④xπ-2(此处π为常数)中,是分式的有( )A.①②B.③④C.①③D.①②③④
题型:选择题 He ________ to the lab than he set out to do the experiment. A.has no sooner got B.no sooner got C.will no sooner get D.had no sooner got 查看答案