單項(xiàng)選擇題It is important to note that from the core company’s perspective, the supply chain includes （）, upstream supplier and down stream customers.

A.Internal functions
B.External functions
C.Information systems
D.Physical distribution


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2.單項(xiàng)選擇題（）are respectively the dominant transport mode in China and in the United States.

A.Rail and motor
B.Motor and rail
C.Rail and rail
D.Water and rail