A.acids or alkalies
B.diesel oil
C.acids，but not alkalies
D.alkalies，but not acids
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A.without losing the rhythm of respiration
B.only with the help of two other people
C.by not stopping the respiration for more than 5 minutes
D.at ten-minute intervals
A.directly under the boom
B.moving away from the boom
C.stopped dead in the water
D.tied to the boom
A.hoist man
B.limit switch
C.brake handle
D.preventer bar
A.is
B.is to be
C.will be
D.being
A.with puncture wounds
B.when all other means have failed
C.when the victim is unconscious
D.to prevent bleeding from minor wounds
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The first treatment given to a person overcome by benzene vapor should be to（）.
In rough weather，when a ship is able to maneuver，it is best to launch a lifeboat（）.
Symptoms of heat stroke are（）.
The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.
The MINIMUM acceptable size for a towing bridle would be that size in which the safe working load (SWL) of each leg of the bridle is equal to（）.
Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.
If help has not arrived in 10-12 hours after you abandon a vessel in a survival craft，you should（）.
The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.
The minimum concentration of a vapor in air which can form an explosive mixture is called the（）.
The MOST important element in administering CPR is（）.