The function of lubricating oil is to （）.<br>A:reduce friction between moving surfaces<br>B:provide even distribution of bearing wear<br>C:reduce the accumulation of harmful detergents<br>D:maintain a constant oil temperature output at each beating

The function of lubricating oil is to （）.
A:reduce friction between moving surfaces
B:provide even distribution of bearing wear
C:reduce the accumulation of harmful detergents
D:maintain a constant oil temperature output at each beating

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