单项选择题
As a watch officer when bunkering, which of the following does require his individual attention?（）
A.draft of the vessel
B.rate of delivery
C.communication with terminal personnel
D.observation of manifold valves
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A.be safe if mixed with fresh water
B.prevent seasickness
C.promote urine excretion
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Immediately after abandoning a vessel, lookouts should be posted aboard liferafts to look for（）
A.survivors in the water
B.food and water
C.land
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When administering artificial respiration to an adult, the breathing cycle should be repeated about （）
A.12 to 15 times per minute
B.18 to 20 times per minute
C.20 to 25 times per minute
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