The purpose of inert gas systems aboard tank vessels is to（）.<br>A:allow sufficient oxygen in the tank to sustain life<br>B:prevent outside air from entering the tank<br>C:provide increase in cargo discharge pressure<br>D:comply with double hull pollution prevention regulations

The purpose of inert gas systems aboard tank vessels is to（）.
A:allow sufficient oxygen in the tank to sustain life
B:prevent outside air from entering the tank
C:provide increase in cargo discharge pressure
D:comply with double hull pollution prevention regulations

出自：海船船员证

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