单项选择题 According to Annex I of MARPOL 73/78, the instantaneous discharging rate of the oily waste from cargo tanks of oil tankers must be lower than（）

单项选择题 According to Annex I of MARPOL 73/78, oily waste from cargo tanks of oil tankers can be discharged when the ship is more than（）away from the nearest land.

单项选择题 The MARPOL Convention is the main international convention（）