A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.<br>A:contaminated with sludge<br>B:contaminated with carbon<br>C:diluted with fuel oil<br>D:diluted with water

A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.
A:contaminated with sludge
B:contaminated with carbon
C:diluted with fuel oil
D:diluted with water

出自：海船船员证

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