单项选择题
A. Wrong B. Not total true C. True D. Not clear here
Where is the rail service better than U.S? （）A.Canada ...
单项选择题Where is the rail service better than U.S? （）
A.Canada B.Europe C.Japan D.Nowhere
If you make different trade in different countries, you...
单项选择题If you make different trade in different countries, you must take different transport modes? （）
A.Yes B.Not C.It must be based on cost D.Not mention in the paragraph
Pipeline is low cost and reliable. Is it true? （）A.Depe...
单项选择题Pipeline is low cost and reliable. Is it true? （）
A.Dependable B.Not C.Yes D.Not mention here
