99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

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

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

<ruby id="n2dk7"><xmp id="n2dk7"></xmp></ruby>

<ruby id="n2dk7"><xmp id="n2dk7"></xmp></ruby>