2. 计算机
  3. User　programs　interact　with　the　kernel　through　a　set　of　standard(71).　They　request　services　to　be　provided　by　the　kernel.　Such　s

User　programs　interact　with　the　kernel　through　a　set　of　standard(71).　They　request　services　to　be　provided　by　the　kernel.　Such　s

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问题 User　programs　interact　with　the　kernel　through　a　set　of　standard(71).　They　request　services　to　be　provided　by　the　kernel.　Such　services　would　include　accessing　a　file:　open　close,　read,　write,　link,　or　execute　a　file;　starting　or(72)accounting　records;　changing　ownership　of　a　file　or(73);　changing　to　a　new　directory;　creating,(74),　or　killing　a　process;　enabling　access　to　hardware　devices;　and　setting　limits　on　system　resources.　Unix　is　a　multi　-user,　multi　-tasking　operating　system.　You　can　have　many　users　logged　into　a　system　simultaneously,　each　running　many　programs.　It’s　the　kernel’s　job　to　keep　each　process　and　user　separate　and　to　regulate　access　to(75),　including　cpu,　memory,　disk　and　other　L/O　devices.
选项 A、updating
B、renovate
C、renew
D、rehabilitate
答案A
解析 updating：更新
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