单项选择题
If Annex V to MARPOL 73/78 applies to your vessel，you willnot be able to discharge（）anywhere at sea.
A.plastic
B.metal
C.glass
D.paper
单项选择题 How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）.
单项选择题 How many PPM of the oily water can be pumped out within 12 miles along the China coast line?（）.
单项选择题 How is the Master or operator of a vessel required to keep the crew informed of the regulations concerning the discharging of garbage overboard?（）.