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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

單項(xiàng)選擇題

A ship required to carry an Oil Record Book must maintain the book on board for（）.

A.one year
B.two years
C.three years
D.four years