單項(xiàng)選擇題

The diesel engine is a type of （）.

A.turbine engine
B.gas turbine
C.steam engine
D.internal combustion engine

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單項(xiàng)選擇題

The diameters of the crankpins should be measured using （）.

A.a micrometer
B.a bridge gauge
C.a spanner
D.a wrench

單項(xiàng)選擇題

The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no （） is found in the water outlet.

A.water
B.oil
C.scale
D.ridge

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