单项选择题
Those generally used additives for cooling water are either anti-corrosion oils or inorganic（）.
A.gases
B.paints
C.inhibitors
D.detergent
点击查看答案&解析
相关考题
-
单项选择题
This used piston had been tested and approved as a spare part by the （） during last annual repair.
A.agent
B.shipchandler
C.surveyor
D.engineer -
单项选择题
They understand the （） of automatic sludge discharging of the purifierBut they are not good in practice.
A.principle
B.principal
C.cause
D.case -
单项选择题
These piston rings are so badly worn that they must be （）.
A.renewed
B.welded
C.machined
D.chromium-plated
