[单选题]（）are respectively the dominant transport mode in China and in the United States.

正确答案 ：A

Rail and motor

[单选题]What promotes Third Part Logistics developing its business? （）

正确答案 ：A

Outsourcing

[单选题]（）can be used for carrying goods to the pointed place automatically.

正确答案 ：C

Automatic Guided Vehicle

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