题目内容

The coolant gets hot______ it goes through the engine.

A. when
B. where
C. as
D. which

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The ______of the lubricating system is to supply all moving parts inside the engine with lubricating oil.

A. funtion
B. gaol
C. purpose
D. objecive

______ is a mixture of water, oil, dirt and other products of combustion.

A. petrol
B. distillate
C. oil sludge
D. lutrication

Cylinder head contains water ______ for cooling engine.

A. jacket
B. pump
C. tank
D. pipe

Thus, there is constant circulation of ______ between the pan and the working parts of the engine.

A. oil
B. fuel
C. water
D. coolant