2. 计算机
  3. Communication　protocols　are(66)connection-oriented　or　connectionless,(67)whether　the　sender　of　a　message　needs　to　contact　and　ma

Communication　protocols　are(66)connection-oriented　or　connectionless,(67)whether　the　sender　of　a　message　needs　to　contact　and　ma

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问题 Communication　protocols　are(66)connection-oriented　or　connectionless,(67)whether　the　sender　of　a　message　needs　to　contact　and　maintain　a　dialog　with　the　recipient　or(68)send　a　message　without　any,　prior　connect　and　with　the　hope　that　the　recipient　receives　everything.(69).These　methods(70)the　two　ways　that　communication　is　implemented　on　networks.
选项 A、immediately
B、simply
C、accordingly
D、properly
答案B
解析
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