These acid residues must be prevented from entering the crankcase, otherwise the lube oil would be（）<br>A:contaminated<br>B:emulsified<br>C:deteriorated<br>D:oxidated

These acid residues must be prevented from entering the crankcase, otherwise the lube oil would be（）
A:contaminated
B:emulsified
C:deteriorated
D:oxidated

出自：海船船员证

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