【简答题】start with a ( )phrase. ( ) the structure of the presentation give the ( ) move to the ( ) to ( ) / to summarize / to conclude
【简答题】填料塔的内件有( )、( ) 、( )、液体收集再分布器和( ) 。
【单选题】在人体肠道正常菌群中占绝对优势的细菌是( )
【单选题】We've been doing it this way for years; don't rock the boat by trying to introduce new methods. The phrase rock the boat means_
A.
to have missed an opportunity and may not get another
B.
to do something that upsets a situation and causes problems
C.
to cause something to shake or move backward and forward or from side to side
D.
to turn somnething upside down or on its side
【单选题】关于塔、器内件的充填,下列说法错误的是()
D.
塔、器封闭前,应将随身携带的工具、多余物件全部清理干净