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The wooden plug inserted in the vent of a damaged tank should be removed if you are going to ______.
A.pump from the damaged tank
B.fight a fire
C.abandon ship
D.use the crossover system
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单选题The wooden plug inserted in the vent of a damaged tank should be removed if you are going to ().A
pump from the damaged tankB
fight a fireC
abandon shipD
use the crossover system
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