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
单项选择题 The purpose of inert gas systems aboard tankers is to（）.
单项选择题 The number or name of a tank barge shall be（）.
单项选择题 The fresh air intake of the inert gas system（）.
