Operating a diesel engine under light loads and at low temperatures for an exhaust for an

职业资格 成人英语三级 已帮助 人

Operating a diesel engine under light loads and at low temperatures for an exhaust for an extended period can result in________.

A.formation of carbon on the intake and exhaust ports

B.high water jacket temperatures

C.overheated pistons and cylinders

D.an increase in lube oil viscosity due to fuel dilution

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗