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问题详情

（）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

时间：2022-01-03 21:26 关键词：物流英语综合练习物流员（四级）

答案解析

D

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（）is not a physical wall, but a lot of virtual data to protect the computer network.