单项选择题

（）Which area is the most commodity shipped in water transport?

A.In international deep sea
B.In lakes
C.In river and canals
D.Coastal ocean

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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

单项选择题

A.Raw materials
B.Heavy, bulky and low value commodities
C.Semi-processed
D.Great amount goods

单项选择题

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