A firewall is a(72)system designed to(73)an organization’s network aga-inst threats.

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问题 A firewall is a(72)system designed to(73)an organization’s network aga-inst threats.

选项 A、prevent
B、protect
C、develop
D、exploit

答案B

解析 防火墙是一个安全系统,主要用于保护公司内部网络免遭攻击。
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