单项选择题
To whom should the master render the Maritime Declaration of Health when the ship arrives at a port outside the territory?（）.
A.Health doctor B.Health officer C.Health surgeon D.Health person
单项选择题 Upon arrival at the discharging port, the inert gas system is（）.
单项选择题 Vessels are required（）Singapore Port Service when passing the points indicated.
单项选择题 Vessels are warned（）in this area.
