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问题

In motor-ships, _____, after passing through main and motion bearings and oil cooled pisto


In motor-ships, _____, after passing through main and motion bearings and oil cooled pistons, etcis either retained in the bedplate.

A.the fuel oil

B.the lubricating oil

C.the refrigerating oil

D.the hydraulic oil

请帮忙给出正确答案和分析,谢谢!

参考答案
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