If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）<br>A:gas freed<br>B:inerted<br>C:filled with water<br>D:all of the above as necessary

If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）
A:gas freed
B:inerted
C:filled with water
D:all of the above as necessary

出自：海船船员证

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