单项选择题
A.about marine pollution prevention
B.covering safety of life
C.about marine
D.about ship and port security
单项选择题 The latest annex of MARPOL 73/78 is about（）
单项选择题 According to Annex Ⅴ of MARPOL 73/78, the dunnage, lining and packing materials which will float can be discharged when the ship is more than（）away from the nearest land.
单项选择题 According to Annex Ⅳ of comminuted and disinfected sewage using an approved system can be discharged when the ship is more than away from the nearest land（）