单选题To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in （）Aless piston slap and quieter runningBincreased crankshaft bearing wearCslightly greater piston wearDdecreased side pressures
单选题
To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in （）
A
less piston slap and quieter running
B
increased crankshaft bearing wear
C
slightly greater piston wear
D
decreased side pressures
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