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【单选题】
在气动比例积分调节器(如图5-30所示)组成的锅炉水位控制系统中,当水位升高时,调节器输出将 ,给水调节阀是,其调阀开度 。
A.
增大/气/减小
B.
减小/气/减小
C.
增大/气开式/开大
D.
减小/气开式/开大
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【单选题】血清中加入0.01%的硫柳汞的目的是( )
A.
消毒
B.
灭菌
C.
防腐
D.
除菌
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【判断题】Heracles was famous for his strength and courage and for his legendary adventures.
A.
正确
B.
错误
【单选题】如图 30 采用单向顺序阀的顺序动作回路,下列说法不正确的有( )
A.
单向顺序阀 3 控制两缸前进时的先后循序
B.
单向顺序阀 4 控制两缸后退时的先后循序
C.
前进时,换向阀处于左位
D.
顺序阀的调整压力比先动作的液压缸的工作压力低 0.8~1MPa
【单选题】I realize strength and courage aren't always _____ in medals andvictories, but in the struggles we overcome. [     ]
A.
measured
B.
praised
C.
tested
D.
increased
【简答题】You are going to read a passage with 10 statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You...
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【单选题】It is believed that strength and courage aren’t always _________ in medals and victories but in the struggles we overcome.
A.
involved
B.
accumulated
C.
measured
D.
included
【简答题】绘制“三层平面图”,要求绘图比例1:1,出图比例为1:40。 出图后 标高符号为3mm高,则绘制时在CAD中设置标高高度为 ( )mm。
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