【单选题】One of them held the view __ the book said was right.
【判断题】冷冻饮品生产过程中对冷却这一环节的要求是在4小时内将温度降至20°C以下。
【单选题】One of them held the view ____ the book said was right.
【单选题】One of them held the view ______ the book said was right.
【单选题】One of them held the view ________ the book said was right.
【单选题】在液压传动系统中,控制油液压力高低的液压阀称之为( )。
【简答题】在液压系统中,控制油液压力高低或利用压力变化实现某种动作的控制阀通称为 ( ) 。
【单选题】2016年______是我国______宪法日。
【简答题】1950年2月14日,中苏签定《()》,4月11日生效,有效期30年。