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單項(xiàng)選擇題

（）is the way to deliver goods for different shippers in the same truck by the most economic route.

A.Joint Distribution
B.United Distribution
C.Multiple Delivery
D.Joint Delivery

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單項(xiàng)選擇題

（） is not a physical wall, but a lot of virtual data to protect the computer network.

A. Date wall
B. Date channel
C. Database
D. Firewall

單項(xiàng)選擇題

（） is meant to provide facility for customer s need or inquiry and arrange it.

A. Service
B. Business
C. Customer service
D. Making money

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