BH005蒸汽吹扫管线先按加热一冷却一再加热的顺序循环进行。吹扫先采取每次只扫（）根 发布时间：2019-08-12 13:45 │ 来源：www.tikuol.com 题型：单项选择题 问题： BH005蒸汽吹扫管线先按加热一冷却一再加热的顺序循环进行。吹扫先采取每次只扫（）根，轮流吹扫的办法。A.1B.2C.3D.4
题型：单项选择题 Some people suggest changing the date for the college entrance exams into _____ Saturday and Sunday of the first week of June, which I think is _____ good advice.A. /; /B. the; the C. the; aD. the; / 查看答案