抽油机井封井器的闸板是用()做成的。A、铸铁 B、橡胶 C、铁板 D、硬塑 发布时间:2019-01-29 18:01 │ 来源:www.tikuol.com 题型:单项选择题 问题: 抽油机井封井器的闸板是用()做成的。A、铸铁B、橡胶C、铁板D、硬塑
题型:单项选择题 It is said that by no means _____ to get into this laboratory without Mr. Jackson's permission. [ ]A. can the students be allowed B. the students can be allowed C. con be the students allowed D. can be allowed the students 查看答案