单选题The tendency for lubricating oil to thin out at high temperatures and thicken at low temperatures will be characterized by a （）.Alow viscosity indexBhigh viscosity indexChigh neutralization numberDlow demulsibility quality
单选题
The tendency for lubricating oil to thin out at high temperatures and thicken at low temperatures will be characterized by a （）.
A
low viscosity index
B
high viscosity index
C
high neutralization number
D
low demulsibility quality
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