How long the haul for international deep-sea movement usually? （） Very long。 Ten thousands of miles。 Thousands of miles。 Thousands of kilometers。
Which area is the most commodities shipped in water transport?（） In international deep sea。 In lakes。 In river and canals。 Coastal ocean。
What is the meaning “speed is not of primary importance”? （） Speed is important。 Speed is not the most important。 Speed is mainly important。 Speed is first important。
Where is the most air freight shipped in the passenger aircraft?（） separately。 Not clear。 In the lower part。 Not mention here。
How much is the percent of air transportation in all modes? （） Less than 1%。 Lowest。 Lower。 Low。
How many categories are there in water transport?（）
