单项选择题
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
Cost of pipeline is very different of underground condi...
单项选择题Cost of pipeline is very different of underground conditions. Is it right? （）
A.Not B.Yes C.They can’t compare D.Not discussion in the paragraph
