单项选择题
Which lashing materials would be used in securing light vehicles aboard Ro-Ro vessels（）.
A.Chain lever or turnbuckle B.Webbing C.Chain D.None of the above
单项选择题 Which lashing gear used aboard Ro-Ro vessels should be painted or soaked in oil when not in use（）.
单项选择题 Which knot should be used to send a man over the side when he may have to use both hands（）.
单项选择题 Which knot reduces the strength of a line by the LEAST amount（）.
