单项选择题
A.Railroad B.Motor C.Both of them D.Neither of them
（）are respectively the dominant transport mode in China...
单项选择题（）are respectively the dominant transport mode in China and in the United States.
A.Rail and motor B.Motor and rail C.Rail and rail D.Water and rail
Since rail network is not as extensive as highway netwo...
单项选择题Since rail network is not as extensive as highway network in most countries and its limitation to fixed track facilities, as a result, railroads provide （） service.
A.Door to door B.Door to cy C.Door to cfs D.Terminal to terminal
In general, factors influencing transportation costs ca...
单项选择题In general, factors influencing transportation costs can be grouped into 2 major categories---product-related factors and market-related factors. Please find below, （）is not belong to the market-related factors.
A.Transport distance B.Location of markets C.Freight traffic in a region D.Seasonality of product movements
