单项选择题

（）is the general meaning of the contract bill note and proof in the process of logistics.

A.logistics activity
B.logistics documents
C.logistics paper
D.documents

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单项选择题

A Logistics information system
B.cable
C.Internet
D.computer

单项选择题

A.Labor-intensive
B.capital-intensive
C.tech-intensive
D.Low cost and high return

单项选择题

A.air
B.rail
C.truck
D.pipeline