單項選擇題

If a vessel takes a sudden severe list or trim from an unknown cause，you should FIRST（）.

A.determine the cause before taking countermeasures
B.assume the shift is due to off-center loading
C.counterflood on the side opposite the list or trim
D.assume the cause is environmental forces

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單項選擇題

The disinfection of various compartments in a vessel by filling them with a gaseous agents to destroy rats etc.means（）.

A.fire drills
B.washing and cleaning
C.fumigation
D.quarantine

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If a vessel takes a sudden severe list or trim from an unknown cause，you should FIRST（）.

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The disinfection of various compartments in a vessel by filling them with a gaseous agents to destroy rats etc.means（）.