单项选择题
A.turned on B.turning on C.turn on D.to turn on
Unless such oil tanker carries crude oil which is not s...
单项选择题Unless such oil tanker carries crude oil which is not suitable for crude oil washing，the oil tanker shall（）the system in accordance with the requirements of that Regulation.
A.operate B.check C.install D.overhaul
The purpose of the deck seal in an inert gas system is ...
单项选择题The purpose of the deck seal in an inert gas system is to prevent（）.
A.flammable vapors from entering machinery space B.flue gas escaping to atmosphere C.inert gas escaping to atmosphere D.air entering inert gas system
The purpose of inert gas systems aboard tankers is to（）...
单项选择题The purpose of inert gas systems aboard tankers is to（）.
A.allow sufficient oxygen in the tank to sustain life B.prevent outside air from entering the tank C.provide more discharge pressure D.comply with pollution regulations
