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單項(xiàng)選擇題

（）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

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單項(xiàng)選擇題

What is the meaning of “short hauls”? （）

A. Near way
B. The distance is not long
C. Direct line
D. Short road

單項(xiàng)選擇題

Motor transport has the biggest market share in the paragraph. Is it true or not （）

A. Yes
B. Depend
C. Not clear
D. No mention

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