单项选择题
Where is thicker plating usually found in the construction of integral tanks on a ship? （）
A.On the outside of the tank B.At the bottom of the tank C.At the top of the tank D.At the center of the tank
单项选择题 When fueling has been completed（）.
单项选择题 When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.
单项选择题 What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）
