单项选择题
How much is the percent of air transportation in all modes?（）
A.Less than 1%
B.Lowest
C.Lower
D.Low
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相关考题
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单项选择题
What kind of products do the air carriers deliver? （）
A.The high value
B.Low density or weight
C.A and B
D.Shortest time to transport -
单项选择题
What is the disadvantage for air transportation?（）
A.Quick but not safe
B.Less frequency
C.It can’t lift heavy goods
D.The highest cost in all transport modes -
单项选择题
What is the meaning of “short hauls”?（）
A.Near way
B.The distance is not long
C.Direct line
D.Short road
