【单选题】What should be done with the crankcase?
A.
The crankcase should be heated up.
B.
The crankcase should be sealed up.
C.
The crankcase should be vented.
D.
The crankcase should be clear of obstacles
【单选题】某产品售价 200 元,单位变动成本 160 元,固定成本总额为 100 000 元,预计销售量为 5 000 件,则安全边际率和边际贡献率分别为( )
【单选题】“ 感于哀乐,缘事而发 ” 是对( )的基本精神的评价。
【单选题】某产品单位售价200元,单位变动成本160元,固定成本总额为100 000元,预计销售量为5 000件,则安全边际率和贡献边际率分别为( )。
【单选题】A diesel engine crankcase ventilation system _____.
A.
prevents spark generation
B.
removes combustible gases
C.
determines the level of combustible gases
D.
provides inert gas generation in crankcase
【单选题】How dose water enter the crankcase of a diesel engine?
A.
Through the crankcase exhauster
B.
As water vapor contained in blow-by
C.
Demulsifying lube oil passing through the main bearings
D.
Condensation from vapor formed in the expansion tank
【单选题】“ 感于哀乐,缘事而发 ” 是对( )的基本精神的评价。
【单选题】立领的变化主要有____变化、领口变化、开门变化、装饰变化。
【单选题】Crankcase explosions in propulsion diesel result from()
A.
the splashing of lubrication oil by the crankshaft
B.
the dilution of crankcase oil with particles of combustion
C.
broken fuel lines spraying oil on the crankcase
D.
the ignition of unburned fuel and air in the crankcase
【单选题】某工厂的投资方案实现后,生产一种产品,产品售价120元,年固定成本160万元,单位变动成本40元,当达到年设计生产能力4万件时,企业利润是多少?( )