汽油中应该清除的不良组分是()。A、烯烃 B、二烯烃 C、环烷烃 D、芳香烃 发布时间:2017-07-17 08:20 │ 来源:www.tikuol.com 题型:单项选择题 问题: 汽油中应该清除的不良组分是()。A、烯烃B、二烯烃C、环烷烃D、芳香烃
题型:单项选择题 We havc got only onc chair, and we need _______. [ ]A. five more chairs B. other five chairs C. more five chairs D. five another chairs 查看答案