单选题Lubricating oil viscosity in an operating diesel engine can be reduced by（）Aincreasing cooling water flowBincreasing lube oil flowCdilution by fuel oilDadding SAE 70 oil
单选题
Lubricating oil viscosity in an operating diesel engine can be reduced by（）
A
increasing cooling water flow
B
increasing lube oil flow
C
dilution by fuel oil
D
adding SAE 70 oil
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