单项选择题
It is often necessary to put an engine into （） service with one or more cylinders cut out, or with a turbocharger secured.
A.additional
B.permanent
C.temporary
D.long
点击查看答案&解析
相关考题
-
单项选择题
The cylinder oil will have to neutralize the acidic products of combustion and have good （） properties to keep the metal surfaces clean.
A.detergent
B.de-oiling
C.defrosting
D.demulsifying -
单项选择题
As for turbine oil, contact with water in the form of steam will be inevitable so good （） properties will be essential.
A.defrosting
B.de-oiling
C.demulsifying
D.dehumidifying -
单项选择题
Any carbon built up on surfaces must be washed away by （） additives and held in suspension by a （） additive.
A.dispersant；detergent
B.detergent；dispersant
C.dispersant；dispersant
D.detergent；detergent
