單項選擇題

If the temperature drops low enough, oil will not flow, （） just tell us the temperature.

A.Hash point
B.Viscosity
C.Pour point
D.Cetane number

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單項選擇題

The （） can tell us how much heat we can get from the burning of an oil.

A.viscosity
B.flash point
C.cetane number
D.calorific value

單項選擇題

（） into the cylinder because no fuel can burn （） it.

A.Air must be admitted；without
B.Oil must be injected；without
C.Air must be admitted；with
D.Oil must be injected；with