主轴转速、润滑油的粘度与承载能力的关系?
参考答案:
当转速一定,粘度越大,承载能力越大;当粘度一定,转速越高,承载能力越大。
Young men should constantly _________their own state of mind so as to adapt to the circumstances in which fierce competition is going on .
A.modify
B.adjust
C.conduct
D.liberate
柴油机的组成中不包括()。
A.润滑系
B.冷却系
C.点火系
D.起动系