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單項(xiàng)選擇題

Defective atomizer in a diesel engine will lead to（）.

A.smoky exhaust
B.starting failure
C.overload
D.over speed

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單項(xiàng)選擇題

A supercharged engine differs from an un-supercharged engine it operates at an increases pressure（）.

A.in which
B.on which
C.at which
D.in that

單項(xiàng)選擇題

Cooling makes the engine metals their mechanical properties（）.

A.Remain
B.to remain
C.retain
D.to retain

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