单项选择题
If the goods shipped are perishable，low cost goods，live animals，deck cargo，etc.，the freight and all related charges shall be paid（）.
A.at the time of shipment B.on vessel's arrival C.at the time of sailing D.at the time the voyage has been accomplished
单项选择题 How is the size of chain determined?（）.
单项选择题 Freeing ports on a vessel with solid bulwarks（）.
单项选择题 An advantage of nylon rope over manila rope is that nylon rope（）.
