单选题There is a support ring between the cylinder block and collar of the cylinder liner, thus carrying both the liner and the cylinder coverIt also passes to the cooling bores and to the cover（）Acooling waterBcooling oilCrefrigerantDlubricate oil
单选题
There is a support ring between the cylinder block and collar of the cylinder liner, thus carrying both the liner and the cylinder coverIt also passes to the cooling bores and to the cover（）
A
cooling water
B
cooling oil
C
refrigerant
D
lubricate oil
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