A.u = 2x 1 ,v = 2y 1 B.u = 2x + 1 ,v = 2y 发布时间:2018-06-01 03:01 │ 来源:www.tikuol.com 题型:单项选择题 问题: A.u = 2x 1 ,v = 2y 1B.u = 2x + 1 ,v = 2yC.u = 2x + 1,v = 1 2yD.u = 2x ,v = 2y