单项选择题
A.dispersant；detergent B.detergent；dispersant C.dispersant；dispersant D.detergent；detergent
The （） of an oil refers to its ability to mix with wate...
单项选择题The （） of an oil refers to its ability to mix with water and then release the water in a centrifuge.
A.oxidation resistance B.carbon-forming tendency C.demulsibility D.acidity
Obviously, for a given fuel oil, its pour point is （） i...
单项选择题Obviously, for a given fuel oil, its pour point is （） its cloud point.
A.lower than B.higher than C.as same as D.better than
The higher the cetane number, （） the ignition quality o...
单项选择题The higher the cetane number, （） the ignition quality of the fuel.
A.the worse B.the better C.the smaller D.the greater
