单选题A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）Awater contaminationBmixing oils of two widely different viscositiesCoverheatingDaeration
单选题
A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）
A
water contamination
B
mixing oils of two widely different viscosities
C
overheating
D
aeration
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