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Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(3). A transmission from any station propagates the length of the medium in both directions and can be received by all other (4). At each end of the bus is a (5) , which absorbs any signal, removing it from the bus. 空白(2)处应选择()
病人不慎咬破体温计,下列处理错误的是()。
某调查中心发布报告称,本国家庭的平均住房面积为116.4平方米,人均住房面积为36.0平方米,所以大部分居民的居住环境已经达到“小康水平”。下列各项最能削弱该结论的是( )。
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具有降压效应的药物是:
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