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【单选题】
导致IS曲线向左移动的因素有( )A.
投资增加
B.
政府购买增加
C.
储蓄增加
D.
消费增加
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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】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】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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