單項選擇題（） 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


你可能感興趣的試題

1.單項選擇題（） is meant to provide facility for customer s need or inquiry and arrange it.

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

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

A.Save money  
B.Increase cost  
C.Cost planning  
D.Cost control

3.單項選擇題Re-handling can save cost and improve service, Is it true or not? （）

A. Wrong
B. Not total true
C. True
D. Not clear here

4.單項選擇題Where is the rail service better than U.S? （）

A.Canada 
B.Europe 
C.Japan 
D.Nowhere

5.單項選擇題If you make different trade in different countries, you must take different transport modes? （）

A.Yes    
B.Not    
C.It must be based on cost    
D.Not mention in the paragraph

6.單項選擇題Pipeline is low cost and reliable. Is it true? （）

A.Dependable 
B.Not 
C.Yes 
D.Not mention here

7.單項選擇題Cost of pipeline is very different of underground conditions. Is it right? （）

A.Not 
B.Yes 
C.They can’t compare 
D.Not discussion in the paragraph

8.單項選擇題Pipeline is able to deliver the products based on the advantages of low rate of loss and damage, minimal climatic effects and reduced labor cost. Do you agree? （）

A.Yes, I do.  
B.No, I do think so.  
C.I don’t find it here  
D.I can’t find it here

9.單項選擇題What are the major goods moved in pipeline transport? （）

A.Natural gas 
B.Crude oil 
C.water 
D.A, B and C

10.單項選擇題The main disadvantage is（）in global logistics.

A.unqualified products   
B.Different languages
C.Transportation delayed 
D.Unreliable delivery of goods