[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ff-Lsz16L49lR7WmMe9FoBCoetzF87YZsJG4LXXgMaiw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":77},[],"2024-01-02 21:05:37",125765613,[8,9,10,11],"绝缘保护套层","外导体屏蔽层","绝缘层","内导体",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},14,"ec5cf3f06b17f38635c940f7b580f1c5","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fccbe5b93b8bb98d55946f0e3605cd8dc.jpg","计算机网络","work_29718782","第2章 物理层作业2022","同轴电缆的结构包括( )",[21,32,41,50,59,68,78,87,96,105],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],125765593,[25,26,27,28],"调幅","调频","调相","调制","最基本的调制方法不包括( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],125765596,[36,37,38,39],"不归零码","归零码","曼彻斯特编码","差分曼彻斯特编码","不具有自同步能力的编码方式是( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],125765599,[45,46,47,48],"双绞线","同轴电缆","光纤","微波","下列物理层传输媒体中,( )不属于导引型",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],125765603,[54,55,56,57],"报文","分组","帧","比特","物理层的协议数据单元是( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],125765605,[63,64,65,66],"半单工通信","单工通信","半双工通信","全双工通信","对讲机的通信方式是( )",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":77},[],125765608,[72,73,74,75],"机械特性","电气特性","功能特性","过程特性","物理层与传输媒体接口相关的特性包括( )",1,{"answer":79,"createTime":5,"id":80,"options":81,"question":86,"source":30,"type":77},[],125765610,[82,83,84,85],"电子信号","模拟信号","数字信号","物理信号","根据信号中代表消息的参数的取值方式不同,信号可分为( )",{"answer":88,"createTime":5,"id":89,"options":90,"question":95,"source":30,"type":77},[],125765611,[91,92,93,94],"频分复用","时分复用","波分复用","码分复用","信道复用技术主要包括( )",{"answer":97,"createTime":5,"id":98,"options":99,"question":104,"source":30,"type":77},[],125765612,[100,101,102,103],"源系统","传输系统","目的系统","物理系统","一个数据通信系统可划分为( )",{"answer":106,"createTime":5,"id":6,"options":107,"question":19,"source":30,"type":77},[],[8,9,10,11]]