单选题Dirt should not be allowed to contaminate a grease lubricant because the （）.Adirt will cause corrosion of bearingBbearings will leak oil excessivelyCdirt is very abrasive when mixed with greaseDgrease will become inflammable
单选题
Dirt should not be allowed to contaminate a grease lubricant because the （）.
A
dirt will cause corrosion of bearing
B
bearings will leak oil excessively
C
dirt is very abrasive when mixed with grease
D
grease will become inflammable
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