2. 计算机
  3. A　local-area　network(LAN)is　a　communications　network　that(125)a　variety　of　devices　and　provides　a(126)for　information　exchange　a

A　local-area　network(LAN)is　a　communications　network　that(125)a　variety　of　devices　and　provides　a(126)for　information　exchange　a

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问题 A　local-area　network(LAN)is　a　communications　network　that(125)a　variety　of　devices　and　provides　a(126)for　information　exchange　among　those　devices.　The　scope　of　the　LAN　is　small　typically　a　single　building　or　a　cluster(丛)of　buildings.　The　LAN　is　usually　owned　by　the　same　organization　that　owns　the(127)devices.　The　internal　data　rate　of　LAN　is　at　least　several　Mb/s.The　basic　of　LAN　communication　is　broadcasting.　At　each　station,　there　is　a　　transmitter/receiver　that　communicates　over　a(128)shared,　By　other　stations.　A　transmission　from　any　one　station　is(129)to　and　received　by　all　other　stations.
选项 A、broadcast
B、cable
C、control
D、means
E、internet
答案D
解析
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