单项选择题
Which of the following tensioning devices is used with webbing to secure light vehicles aboard Ro-Ro vessels（）.
A.Chain lever B.Buckle tensioner C.Adjust-a-matic tensioner D.Turnbuckle
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（）.
单项选择题 When using the term limber system one is referring to a（）.
