2. 计算机
  3. Password　is　a(n)(71)series　of　characters　that　enables　a　user(72)a　file,　computer　or　program.　On　multi　-　user　systems,(73)user　mu

Password　is　a(n)(71)series　of　characters　that　enables　a　user(72)a　file,　computer　or　program.　On　multi　-　user　systems,(73)user　mu

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问题 Password　is　a(n)(71)series　of　characters　that　enables　a　user(72)a　file,　computer　or　program.　On　multi　-　user　systems,(73)user　must　enter　his　or　her　password(74)the　computer　　will　respond　to　commands.　The　password　helps　ensure　that　unauthorized　users　do　not　access　the　computer.　In　addition,　data　files　and　programs　may　require　a　password.
　　　Ideally,　the　password　should　be　something(75)could　guess.　In　practice,　most　people　choose　a　password　that　is　easy　to　remember,　such　as　their　name　or　their　initials.　This　is　one　reason　it　is　relatively　easy　to　break　into　most　computer　system.
选项 A、after
B、when
C、while
D、before
答案D
解析
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