Shipping society approved buoyant work vests are considered to be items of safety equipment and may be worn by members of the crew（）.
1、The approval period for a shipboard Oi
The approval period for a shipboard Oil Pollution Emergency Plan expires after（）.Atwo yearsBthree yearsCfour yearsDfive year
2、Shipping Qulity，Shipping Weight实际上是剥夺了
Shipping Qulity，Shipping Weight实际上是剥夺了买方的复验权，对于买方不公平。A正确B错误
3、If the buoyant force on a ship’s hull
If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.Arequire ballastBbe down by the headCsinkDfloat
4、If the buoyant force on a ships hull i
If the buoyant force on a ships hull is equal to or greater than the displacement tonnage, the ship will （）.Arequire ballast added to only the port side tanksBbe down by the headCsinkDfloat
5、Schools（）an important role in society.
Schools（）an important role in society.AmakeBdoCtakeDplay
6、Where do you obtain approved placards
Where do you obtain approved placards containing instructions for the launching and inflation of an approved inflatable liferaft? （）AOfficer in...