單項(xiàng)選擇題（）is not a physical wall but a flow virtual data to protect the computer network.

A.data wall 
B.data channel 
C.database 
D.firewall


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1.單項(xiàng)選擇題（）means to provide facility for customer’s need or inquiry and arrange it.

A.service
B.business
C.customer service
D.making money

2.單項(xiàng)選擇題Saving or reducing expenditure in business is（）

A.save money
B.increase cost
C.cost planning
D.cost control

3.單項(xiàng)選擇題（）is guaranteed by the full market supply and just-in-time logistics.

A.zero inventory 
B.stock  
C.inventory  
D.outsourcing inventory

4.單項(xiàng)選擇題（）has 3 specific points: fixed port, fixed line and announcing shipping time in advance.

A.liner transport  
B.line ship 
C.line container 
D.line

5.單項(xiàng)選擇題（）is very convenient equipment for loading and unloading goods.

A.crane 
B.pallet truck 
C.fork lift 
D.fork lift truck