问题描述：
[单选]
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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答案解析：无
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