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路由器工作在ISO/OSI模型的_____。
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路由器工作在ISO/OSI模型的_____。
A、应用层
B、网络层
C、数据链路层
D、物理层
时间：2021-09-01 16:40
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B
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Tables______ of stones or wood.
路由器工作在ISO/OSI模型的_____。
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