A.be safe if mixed with fresh water
B.prevent seasickness
C.dehydrate you
D.protect against heat cramps
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A.acids or alkalies
B.diesel oil
C.acids，but not alkalies
D.alkalies，but not acids
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
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The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.
The first treatment given to a person overcome by benzene vapor should be to（）.
Symptoms of heat stroke are（）.
Once you have established the daily ration of drinking water in a survival situation，how should you drink it?（）
The backup system on an electric start survival craft is a（）.
Number 3 lifeboat would be（）.
The object of plugging holes below the waterline on a ship should be to（）.
The lifeboat releasing gear lever should be marked with the words（）.
The device that allows a floating ship to sway without bending the marine riser system is the（）.
The Master or person in charge of a ship shall insure that each deck from which lifeboats are launched is（）.