单项选择题
A.Provides for faster loading
B.Lowers oxygen content in the tank
C.Provides better fuel economy
D.All of the above
单项选择题 Upon arrival at the discharging port，the inert gas system is（）.
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.
单项选择题 The purpose of the deck seal in an inert gas system is to prevent（）.