单项选择题
A. In international deep sea B. In lakes C. In river and canals D. Coastal ocean
What is the meaning “speed is not of primary importance...
单项选择题What is the meaning “speed is not of primary importance”? （）
A. Speed is important B. Speed is not the most important C. Speed is mainly important D. Speed is first important
What are transported mainly by water? （）A. Raw material...
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
