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【单选题】
压力控制阀一般分为( )。
A.
溢流阀、减压阀、顺序阀
B.
溢流阀、减压阀
C.
减压阀、顺序阀
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【简答题】According to the normal ratio of ions in the air, how many negative ions are there in one cubic centimeter of air? ____________.
【单选题】以咳嗽、喘息为主要表现的是( )
A.
急性上呼吸道感染
B.
哮喘性支气管炎
C.
支气管肺炎
D.
金黄色葡萄球菌
E.
腺病毒性肺炎
【单选题】The fresh air coming in through the inner air ports, is compressed by _____ to a higher pressure.
A.
the cylinder head
B.
the cross-head
C.
the moving piston
D.
the stationary piston
【单选题】Under normal conditions, the quantity of air circulation becomes less and lessWhat is the reason?
A.
dirty delivery ducts
B.
too much refrigerant
C.
the fouling filters
D.
high temperature outside
【单选题】如果将“微调偏移”的数值改为1mm,代表的含义是 如
A.
当鼠标移动图形时,每次移动的距离为1mm
B.
当使用鼠标移动图形时,如果靠近另一个图形距离小于或等于1mm,将自动捕捉
C.
当使用方向键移动图形时,每次移动的距离为1mm
D.
当按下数值增加或减少的黑色小三角时,增加或减少的数值为1mm
【简答题】Translate the following sentences into English.(一空一个翻译) 1. 这个月晚些时候,我们要给果树喷洒药水,要油漆谷仓,要给菜园播种,要赶在新的雏鸡到来之前清扫鸡舍。 2.我挣的钱远比不上全职工作时的收入,可如今我们需要的钱也没有过去多。 3.至于保险,我们买了一份低收入者的主要医疗项目保险。 4. 在作物生长季节,根本就没功夫参加社交活动。 5. ...
【单选题】Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?
A.
Faulty turbocharger turbine diffuser ring
B.
Faulty turbocharger compressor ring
C.
Insufficient cooling water flow
D.
Clogged air intake filters
【单选题】Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?
A.
Clogged air intake falters
B.
Piston blow-by
C.
A defective after-cooler
D.
Faulty exhaust valves
【单选题】如果将“微调偏移”的数值改为1mm,代表的含义是:
A.
当鼠标移动图形时,每次移动的距离为1mm
B.
当使用鼠标移动图形时,如果靠近另一个图形距离小于或等于1mm,将自动捕捉
C.
当使用方向键移动图形时,每次移动的距离为1mm
D.
当按下数值增加或减少的黑色小三角时,增加或减少的数值为1mm
【单选题】Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine? .
A.
Excessive piston blow-by to the manifold
B.
Insufficient cooling water flow
C.
Accumulated water in the air boxes
D.
Clogged air intake filters
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