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【单选题】
阀在液压系统中起调压作用,当阀进口压力等于调整压力时,阀阀口是开启的,阀开始( )。A.
B.
升温
C.
降温
D.
升压
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反馈参考答案：
举一反三
【单选题】An argument made by supporters of smoking was that
A.
there was no scientific evidence of the correlation between smoking and death.
B.
the number of early deaths of smokers in the past decades was insignificant.
C.
people had the freedom to choose their own way of life.
D.
antismoking people were usually talking nonsense.
【单选题】溢流阀调定系统工作压力,应根据液压系统允许的超载最大工作压力设定,一般不超过系统额定工作压力的()
A.
10%-20%
B.
20%-30%
C.
30%-40%
D.
40%-50%
【单选题】One can be easily _____ smoking in a smoking family.
A.
addicted to
B.
get in the habit of
C.
found
D.
interesting to
【单选题】Smoking, which may be a pleasure for some people, is a serious source of discomfort for their fellows. Medical authorities express their【B1】about the effect of smoking on the health not only【B2】those ...
A.
concern
B.
trouble
C.
interest
D.
displeasur
【简答题】美术课程的改革不仅是内容的改革,也是 () 和 教学方法 的改革。
【简答题】美术课程的改革不仅是内容的改革，也是（）和（）的改革。
【简答题】空燃比反馈控制系统是根据 的反馈信号调整 的多少来达到最佳空燃比控制的。
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