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【简答题】
简述中国特色社会主义文化建设的重点任务
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举一反三
【单选题】What are the ______ that distinguish the Chinese from the Japanese?
A.
marks
B.
signs
C.
characteristics
D.
features
【单选题】Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）
A.
In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater
B.
Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports
C.
No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine
D.
The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine
【单选题】The average exhaust temperature of a two-stroke/cycle diesel engine with a turbine-driven supercharger is lower than a similar four-stroke/cycle engine at equal loads because____.
A.
two-stroke/cycle diesel engines have a higher MEP than four-stroke/cycle diesel engine
B.
four-stroke/cycle diesel engine exhaust is cooled by scavenging air
C.
two-stroke/cycle diesel engines have a lower MEP than four-stroke/cycle diesel engines
D.
the opening of the two-stroke/cycle diesel exhaust ports or valves occurs much later than in four-stroke /cycle diesel engine
【单选题】Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of ________.
A.
less even torque
B.
higher cylinder head temperatures
C.
fewer power strokes per revolution
D.
greater weight/size requirements
【简答题】Many Chinese friends went to the party. _________many Chinese friends at the party.
【简答题】简述顾客让渡价值的提升策略。
【单选题】During which of the listed piston stroke of a four-stroke/cycle diesel engine, is the piston moving downward?
A.
Intake stroke
B.
Compression stroke
C.
Exhaust stroke
D.
Pumping stroke
【简答题】Many Chinese friends went to the party.There were many Chinese friends ______.
【单选题】A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine________.
A.
has little or no internal friction
B.
has a lower effective compression ratio
C.
operates with scavenge air under a positive pressure
D.
operates without energy absorbing intake and exhaust strokes
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