2. 计算机
  3. Without proper safeguards，every part of a network is vulnerable to a security breach or unauthorized activity from(1)，competitor

Without proper safeguards，every part of a network is vulnerable to a security breach or unauthorized activity from(1)，competitor

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问题 Without proper safeguards，every part of a network is vulnerable to a security breach or unauthorized activity from(1)，competitors，or even employees．Many of the organizations that manage their own(2)network security and use the Internet for more than just sending／receiving e-mails experience a network(3)一and more than half of these companies do not even know they were attacked.Smaller (4) are often complacent，having gained a false sense of security．They usually react to the last virus or the most recent defacing of their website．But they are trapped in a situation where they do not have the necessary time and (5) to spend on security．
(3)
选项 A、attack
B、collapse
C、breakdown
D、virus
答案A
解析
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