单选题The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.AcrackBknockingCleakingDseizure
单选题
The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.
A
crack
B
knocking
C
leaking
D
seizure
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