无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

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

你可能感興趣的試題

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

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