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【简答题】
循环流化床锅炉的高压流化风机属于哪种风机？其工作原理是什么？
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反馈参考答案：
举一反三
【单选题】My pain ______ apparent the moment I walked into the room, for the first man I met asked sympathetically: 'Are you feeling all fight?'
A.
must be
B.
must have been
C.
had been
D.
had to be
【简答题】简述防碰撞系统的五种警示功能。
【单选题】My pain ______ apparent the moment I walked into the room, for the first man I met asked sympathetically: 'Are you feeling all right?'
A.
must be
B.
must have been
C.
had been
D.
had to be
【单选题】Three "-ings" include the following except .
A.
betting
B.
drinking
C.
tipping
D.
bargaining
【单选题】My pain _______ apparent the moment I walked into the room, for the first man I met asked sympathetically， “Are you feeling all right?”
A.
must be
B.
must have been
C.
should have been
D.
could have been
【单选题】Three “-ings” include the following except .
A.
Betting
B.
Drinking
C.
Tipping
D.
Bargaining
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