单选题The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.Aspecific gravityBviscosityCS E numberDhydrolytic stability
单选题
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
A
specific gravity
B
viscosity
C
S E number
D
hydrolytic stability
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