单项选择题
（）is the Internet commerce designed for direct communications and commercial relationship between a firmand its end customer.
- A.B2C
B.B2B
C.B2A
D.A2B
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多项选择题
Transport agencies include air and surface（）.
A.freightforwarders
B.shipper＇sassociations
C.insurancebrokers
D.transportationbrokers -
多项选择题
Logistics information refers to general logistics（）and documentation.
A.knowledge
B.materials
C.images
D.CPU -
多项选择题
Insurance is very important to logistics because of the potential hazards and dangers in the process,such as（）.
A.fireandtheft
B.unqualifiedproducts
C.techniqueproblem
D.andevennaturaldisasters
