【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】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,则安全边际率和贡献边际率分别为( )。
【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( )。
【判断题】牧草经阳光中紫外线的照射作用,植物体内麦角固醇转化为维生素D。( )
【简答题】“感于哀乐,缘事而发”是对 基本精神的评价。
【单选题】If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?
A.
The cylinder indicator cocks should be opened
B.
The sump lube oil scavenge pump should be secured immediately
C.
The explosion relief valves should be manually opened
D.
The crankcase should remain unopened until the engine has cooled
【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】The blower type crankcase ventilation system ()
A.
removes combustible gases in the crankcase
B.
prevents the formation of combustible gases in the crankcase
D.
improves cold weather starting
【单选题】“感于哀乐,缘事而发”是对( )的基本精神的评价。