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When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）
A:plugging gooseneck tank vents to prevent accident overflow
B:maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C:sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D:maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship

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出自：海船船员证

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