煤气站应具有()电源供电。A.单相 B.二相 C.双路 D.单路 发布时间:2018-01-04 17:40 │ 来源:www.tikuol.com 题型:单项选择题 问题: 煤气站应具有()电源供电。A.单相B.二相C.双路D.单路
题型:单项选择题 The house is dirty because it ________ since they moved out.A.doesn't cleanB.isn't cleanedC.hasn't cleanedD.hasn't been cleaned 查看答案