How is the external flotation bladder of an immersion suit inflated?（） A:It is inflated by a small CO2 bottle that is automatically tripped when the front zipper is at the top of the zipper track B:It is inflated by a small CO2 bottle that is manually tripped C:It is inflated by blowing through an inflation tube D:It inflates by sea water bleeding into the flotation bladder and reacting with a chemical therein

How is the external flotation bladder of an immersion suit inflated?（）
A:It is inflated by a small CO₂ bottle that is automatically tripped when the front zipper is at the top of the zipper track
B:It is inflated by a small CO₂ bottle that is manually tripped
C:It is inflated by blowing through an inflation tube
D:It inflates by sea water bleeding into the flotation bladder and reacting with a chemical therein

出自：海船船员证

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