单项选择题
A ship which is required to carry an Oil Record Book must log in the book（）.
A.discharge of ballast or cleaning water from fuel tanks B.sounding levels of all fuel tanks on a daily basis C.the grade and specific gravity of all fuel oil carried D.fuel consumption rates on a weekly basis
单项选择题 A ship required to carry an Oil Record Book must maintain the book on board for（）.
单项选择题 A Certificate of Financial Responsibility attests that the vessel（）.
