[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$focQywovOCbBdi22fo9kSJ5xHMg6aNywRS_7ZboxzOxA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2025-12-19 18:43:32",273944251,[8,9,10,11],"49.5微秒","22微秒","22毫秒","49.5毫秒",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","车辆总线MVB的速率是1.5Mbit\u002Fs,主设备帧的长度为固定33位,则总线主控设备发送主帧用时( )",[18,29,38,47,54,62,70,79,84,93],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],273944234,[22,23,24,25],"集线器","网卡","网桥","路由器","下列哪个是网络层互联设备( )","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],273944236,[33,34,35,36],"频移键控法","幅度相位调制","振幅键控法","相移键控法","使用载波信号的两种不同幅度来表示二进制值的两种状态的数据编码方式称为( )",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],273944238,[42,43,44,45],"双极码","FSK","曼彻斯特编码","NRZ","通信信道可分为模拟信道和数字信道,下面( )不是数字信道的编码方式",{"answer":48,"createTime":5,"id":49,"options":50,"question":53,"source":27,"type":28},[],273944240,[51,52],"错误","正确","在TCN网络中,司机下达的牵引和制动指令属于过程数据. ( )",{"answer":55,"createTime":5,"id":56,"options":57,"question":61,"source":27,"type":28},[],273944242,[58,59,60],"半双工","单工","全双工","广播属于______________",{"answer":63,"createTime":5,"id":64,"options":65,"question":69,"source":27,"type":28},[],273944244,[66,67,68],"NBd=Rblog2M","log2M=NBdRb","Rb=NBdlog2M","将每秒钟传输码元的个数称为传码率,用NBd表示.设电平数为M,则一个码元可以包含log2M个二进制位.将每秒钟传输的二进制位数称为比特率,用Rb表示,写出Rb和NBd之间的关系",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":27,"type":28},[],273944246,[74,75,76,77],"协议","服务访问点","上述三者","服务","对等层实体之间采用( )进行通信",{"answer":80,"createTime":5,"id":81,"options":82,"question":83,"source":27,"type":28},[],273944248,[59,60,58],"对讲机属于______________",{"answer":85,"createTime":5,"id":86,"options":87,"question":92,"source":27,"type":28},[],273944250,[88,89,90,91],"N层为N十1层提供服务","N十1层将从N层接收的信息增加了一个头","N层对N+1层没有任何作用","N层利用N十1层提供的服务","在OSI模型中,第N层和其上的N+l层的关系包括( )",{"answer":94,"createTime":5,"id":6,"options":95,"question":16,"source":27,"type":28},[],[8,9,10,11]]