环形防喷器是靠()操作开关井的。A、气压 B、液压 C、手动 D、机械 发布时间:2017-07-07 00:22 │ 来源:www.tikuol.com 题型:单项选择题 问题: 环形防喷器是靠()操作开关井的。A、气压B、液压C、手动D、机械
题型:单项选择题 —Jones! Roy has broken the glass.— Such things happen.A.Doesn’t matter.B.How come?C.What a pity!D.What has become of him? 查看答案