单项选择题
A.Speed is important B.Speed is not the most important C.Speed is mainly important D.Speed is first importan
What are transported mainly by water?（）A.Raw materialsB...
单项选择题What are transported mainly by water?（）
A.Raw materials B.Heavy, bulky and low value commodities C.Semi-processed D.Great amount goods
How many categories are there in water transport?（）A.2...
单项选择题How many categories are there in water transport?（）
A.2 B.3 C.4 D.Not available in the paragraph
How many tons does the cargo 737 carry?（）A.100 tons ...
单项选择题How many tons does the cargo 737 carry?（）
A.100 tons B.Not clear C.More than 100 tons D.I don’t know
