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。
What are transported mainly by water? （） Raw materials。 Heavy, bulky and low value commodities。 Semi-processed。 Great amount goods。
How much is the percent of air transportation in all modes? （） Less than 1%。 Lowest。 Lower。 Low。
what kind of products do the air carriers deliver? （） The high value。 Low density or weight。 A and B。 Shortest time to transport。
How many tons does the cargo 737 carry? （）
