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單項(xiàng)選擇題

（）is used to protect goods not to be deteriorated like food and medicine.

A.packaging
B.Green Packaging
C.Vacuum packaging
D.Special packaging

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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

單項(xiàng)選擇題

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

A.Data wall
B.Data Channel
C.Data base
D.firewall

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