[单选题]（）is the disadvantage for air transportation?

正确答案 ：D

the highest cost in all transport modes

[单选题]（）means to provide facility for customer’s need or inquiry and arrange it.

正确答案 ：C

customer service

[单选题]Lean Logisitics的中文意思是（）。

正确答案 ：A

精益物流

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