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單項選擇題

How many tons does the cargo 737 carry? （）

A. 100 tons
B. Not clear
C. more than 100 tons
D. I don’t know

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單項選擇題

Where is the most air freight shipped in the passenger aircraft?（）

A. separately
B. Not clear
C. In the lower part
D. Not mention here

單項選擇題

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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