单选题In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.AinefficiencyBoilinessCdetergencyDpurity
单选题
In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.
A
inefficiency
B
oiliness
C
detergency
D
purity
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