单项选择题
How long the haul for international deep-sea movement usually?（）
A.Very long B.Ten thousands of miles C.Thousands of miles D.Thousands of kilometers
单项选择题 （）Which area is the most commodity shipped in water transport?
单项选择题 What is the meaning “speed is not of primary importance”?（）
单项选择题 What are transported mainly by water?（）
