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單項(xiàng)選擇題

Drinking salt water will （）

A.be safe if mixed with fresh water
B.prevent seasickness
C.promote urine excretion
D.protect against heat cramps

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單項(xiàng)選擇題

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
D.bad weather

單項(xiàng)選擇題

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
D.as fast as possible

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