问题

Proper lubrication of the main bearing is more easily obtained in a single acting four－str

Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because ____.

A.bearing pressure in a four-strokecycle acting single diesel engine is continually reversed

B.bearing pressure in a two-strokecycle single acting diesel engine is continually reversed

C.the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine

D.two-stoke/cycle diesel engines require more complicated lubrication piping

请帮忙给出正确答案和分析，谢谢！

参考答案

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