单选题The external flotation bladder on an immersion suit should be inflated（）.Abefore you enter the waterBafter you enter the waterCafter one hour in the waterDafter you notice that your suit is losing buoyancy
单选题
The external flotation bladder on an immersion suit should be inflated（）.
A
before you enter the water
B
after you enter the water
C
after one hour in the water
D
after you notice that your suit is losing buoyancy
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