单选题The viscosity regulator controls （） in order to provide oil at the correct viscosity for combustion.Athe engines speedBthe engines loadCthe fuel oil temperatureDthe fuel oil flow
单选题
The viscosity regulator controls （） in order to provide oil at the correct viscosity for combustion.
A
the engines speed
B
the engines load
C
the fuel oil temperature
D
the fuel oil flow
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