单选题How is the external flotation bladder of an immersion suit inflated?（）AIt is inflated by a small CO2 bottle that is automatically tripped when the front zipper is at the top of the zipper trackBIt is inflated by a small CO2 bottle that is manually trippedCIt is inflated by blowing through an inflation tubeDIt inflates by seawater bleeding into the inflation bladder and reacting with a chemical
单选题
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 seawater bleeding into the inflation bladder and reacting with a chemical
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