【名词&注释】
供应链(supply chain)、互联网(internet)
[单选题]Railroads own about ()of their car fleet.
A. Half
B. 80%
C. 20%
D. Not mentioned
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[单选题]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
[单选题]Without (), supply chain management doesn’t work.
A. logistics information system
B. cable
C. internet
D. computer
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