單項選擇題() water is more expensive than fresh water It has high specific heat and low viscosity.

A.Distilled
B.Distilling
C.Boiling
D.Boiled


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1.單項選擇題() the engines, the diesel engine is() used engine on board.

A.Between;more commonly
B.Among;the most commonly
C.Between;not more commonly
D.Among;not the most commonly

3.單項選擇題() or air venting arrangement is fitted to the fuel supply passage.

A.An air pump
B.A compressor
C.A fuel pump
D.A priming

4.單項選擇題() neutralizes the acid conditions and() cleanses the rings and grooves.

A.The detergency;the alkalinity
B.The alkalinity;the detergency
C.The inhabitant;the water
D.The additives;the distilled water

5.單項選擇題() is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.

A.An air receiver
B.An operating valve
C.An automatic valve
D.An air distributor