单项选择题
A.packaging B.Green Packaging C.Vacuum packaging D.Special packaging
（）is the way to deliver goods for different shippers in...
单项选择题（）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
（）is not a physical wall, but a lot of virtual data to ...
单项选择题（）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
（） is meant to provide facility for customer’s need or ...
单项选择题（） is meant to provide facility for customer’s need or inquiry and arrange it.
A.Service B.business C.customer service D.making money
