An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）<br>A:have a high viscosity index<br>B:mix readily with refrigerant<br>C:have a high freezing point<br>D:have a low pour point

An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）
A:have a high viscosity index
B:mix readily with refrigerant
C:have a high freezing point
D:have a low pour point

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