By______ , prevent leakage between parts such as pistons, rings and cylinders.
A. antifreeze
B. water
C. coolant
D. lubrications
查看答案
______ can carry away heat by flowing between friction-generating parts.
A. coolant
B. antifreeze
C. lubrications
D. water
The oil pump, oil filter and oil pan, make up the _____of the engine.
A. ignition system
B. fuel system
C. lubricating system
D. cooling system
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