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

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单项选择题

A.2
B.3
C.4
D.Not available in the paragraph

单项选择题

A.100 tons
B.Not clear
C.More than 100 tons
D.I don’t know

单项选择题

A.Separately
B.In same level
C.In the lower part
D.Not mention here