单项选择题
Which space cannot be deducted from gross tonnage when calculating net tonnage（）.
A.Crew messroom B.Forepeak ballast tank C.Master's cabin D.Chain locker
单项选择题 Which of the following tensioning devices is used with webbing to secure light vehicles aboard Ro-Ro vessels（）.
单项选择题 Which of the following is a characteristic of a Ro-Ro vessel（）.
单项选择题 Which arrangement of shell plating is used most in modern shipbuilding（）.
