Of a kind of liquid is used to cool the diesel engine, it is invariably called （）<br>A:lubricant<br>B:coolant<br>C:combustion product<br>D:second refrigerant

Of a kind of liquid is used to cool the diesel engine, it is invariably called （）
A:lubricant
B:coolant
C:combustion product
D:second refrigerant

出自：海船船员证

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