单项选择题
A.frostbite B.skin burns C.asphyxiation D.an explosive reaction
The bottom row of plating next to the keel of a lifeboa...
单项选择题The bottom row of plating next to the keel of a lifeboat is known as the（）.
A.sheer strake B.bilge strake C.garboard strake D.keel rib
The backup system on an electric start survival craft i...
单项选择题The backup system on an electric start survival craft is a（）.
A.hydraulic system B.pneumatic system C.spare battery D.hand crank
Symptoms of sea sickness include（）.A.fever and thirstB....
单项选择题Symptoms of sea sickness include（）.
A.fever and thirst B.nausea and dizziness C.stomach cramps and diarrhea D.reddening of skin and hives
