What are transported mainly by water? （） Raw materials。 Heavy, bulky and low value commodities。 Semi-processed。 Great amount goods。
How many categories are there in water transport?（） 2。 3。 4。 Not available in the paragraph。
How many tons does the cargo 737 carry? （） 100 tons。 Not clear。 more than 100 tons。 I don’t know。
What is the disadvantage for air transportation? （） Quick but not safe。 Less frequency。 It can’t lift heavy goods。 The highest cost in all transport modes。
Loss and damage ration for motor are lower than any other modes. Is it correct?（） Yes。 Depend。 Not。 I don’t know。
How much is the percent of air transportation in all modes? （）
