A.safe speed only specified
B.not less than 120 feet per minute
C.not more than 120 feet per minute
D.not more than 90 feet per minute
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A.remove them to fresh air
B.flush their face with water for about 5 minutes
C.stand them up and walk them around
D.remove their clothing and wrap them in blankets
A.wash the burned area with a warm soap and water solution
B.flood，bathe，or immerse the burned area in cold water
C.cover the burned area with talcum powder and bandag it cover the burned area with talcum powder and bandage it tightly
D.leave the burned area exposed to the atmosphere
A.yaw joint
B.sway joint
C.slip joint
D.flex or ball joint
A.lay
B.lies
C.being lain
D.lying
A.frostbite
B.skin burns
C.asphyxiation
D.an explosive reaction
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The object of plugging holes below the waterline on a ship should be to（）.
Symptoms of sea sickness include（）.
On an oceangoing vessel，for each person a lifeboat (without desalting kits) is certified to carry，the boat must be supplied with（）.
Limit switches（）.
Number 3 lifeboat would be（）.
The depth over a shallow patch，（）about 1．5 miles southeastward of Nanshan Tou lighthouse，reduces to 8 meters.
The minimum concentration of a vapor in air which can form an explosive mixture is called the（）.
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 lifeboat releasing gear lever should be marked with the words（）.
The grab rail of a metal lifeboat is normally located（）.