问答库

题干| 解析| 归类| 考点| 相关| 热门| 搜索
A-A+

Lubricating oil used in a diesel engine serves to _________.

2020-09-18 20:32:17 资格考试 阅读

问题详情

A.reduce the wear of bearing surfaces

B.cool the bearing surfaces

C.assist in sealing bearing surfaces

D.all of the above

请帮忙给出正确答案和分析，谢谢！

参考答案

考点：