输气管道投产前,应进行输气管道的干燥,直至管内空气水露点比输送条件下最低环境温度低( 发布时间:2018-09-24 11:58 │ 来源:www.tikuol.com 题型:单项选择题 问题: 输气管道投产前,应进行输气管道的干燥,直至管内空气水露点比输送条件下最低环境温度低()。A.2℃B.3℃C.4℃D.5℃
题型:单项选择题 Tom ______ up early. But now he doesn't get up early. [ ]A.used to getB.is used get C.was used to getD.used getting 查看答案