2. 计算机
  3. Melissa　and　LoveLetter　made　use　of　the　trust　that　exists　between　friends　or　colleagues.　Imagine　receiving　an(16)from　a　friend　wh

Melissa　and　LoveLetter　made　use　of　the　trust　that　exists　between　friends　or　colleagues.　Imagine　receiving　an(16)from　a　friend　wh

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问题 Melissa　and　LoveLetter　made　use　of　the　trust　that　exists　between　friends　or　colleagues.　Imagine　receiving　an(16)from　a　friend　who　asks　you　to　open　it.　This　is　what　happens　with　Melissa　and　several　other　similar　email(17).　Upon　running,　such　worms　usually　proceed　to　send　themselves　out　to　email　addresses　from　the　victim’s　address　book,　previous　emails,　web　pages(18).As　administrators　seek　to　block　dangerous　email　attachments　through　the　recognition　of　well-known(19),　virus　writers　use　other　extensions　to　circumvent　such　protection.　Executable(.exe)files　are　renamed　to　.bat　and　.cmd　plus　a　whole　list　of　other　extensions　and　will　still　run　and　successfully　infect　target　users.Frequently,　hackers　try　to　penetrate　networks　by　sending　an　attachment　that　looks　like　a　flash　movie,　which,　while　displaying　some　cute　animation,　simultaneously　runs　commands　in　the　background　to　steal　your　passwords　and　give　the(20)access　to　your　network.
选项 A、memory
B、caches
C、ports
D、registers
答案B
解析
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