单选题In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.Atwo crankshaft revolutions in a two-stroke/cycle engineBtwo power strokes in a two-stroke/cycle engineCone power stroke in a two-stroke/cycle engineDtwo piston strokes in a two-stroke/cycle engine
单选题
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
A
two crankshaft revolutions in a two-stroke/cycle engine
B
two power strokes in a two-stroke/cycle engine
C
one power stroke in a two-stroke/cycle engine
D
two piston strokes in a two-stroke/cycle engine
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