停引风机时应()。 A.直接停引风机 B.先关入口再停引风机 C.先开烟道挡板再停引 发布时间:2020-05-17 08:26 │ 来源:www.tikuol.com 题型:单项选择题 问题: 停引风机时应()。A.直接停引风机B.先关入口再停引风机C.先开烟道挡板再停引风机
题型:单项选择题 He lost his job three years ago; _____, he was seriously injured in an accident last week.A.in the first placeB.worse stillC.on the contraryD.in other words 查看答案