[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f8TqsKe_Iw_AgPMiJGsTeryvn8VFvYe0tfBG7pvGKX-I":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":13,"related":14,"source":25,"type":41},[],"2024-06-21 01:05:09",988747264,[8,9],"对","错",{"courseImg":11,"courseName":12},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee42e18b2ffa7b982d41cdbf7c3e6854.jpg","电子产品制作","74LS138是3线&mdash;8线译码器,译码为输出低电平有效,若输入为A2A1A0=110时,输出 应为{10111111}.( )",[15,27,36,42,47,50,60,65,70,75],{"answer":16,"createTime":17,"id":18,"options":19,"question":24,"source":25,"type":26},[],"2024-06-21 01:05:08",988743330,[20,21,22,23],"电压串联负反馈","电流串联负反馈","电压并联负反馈","电流并联负反馈","如图所示电路属于什么反馈 ( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F651ea4ed7929cb3a770ecf848d989953.png\">","v2",0,{"answer":28,"createTime":17,"id":29,"options":30,"question":35,"source":25,"type":26},[],988743766,[31,32,33,34],"差模电压增益","共模电压增益","差模输入电阻","共模抑制比","差分放大电路中适当增大公共发射极电阻,将会使电路的( ) 增大",{"answer":37,"createTime":17,"id":38,"options":39,"question":40,"source":25,"type":41},[],988744438,[8,9],"负反馈只能改善反馈环路内的放大性能,对反馈环路之外无效.( )",3,{"answer":43,"createTime":17,"id":44,"options":45,"question":46,"source":25,"type":41},[],988744751,[8,9],"稳压管的稳定电流 IZ若大于实际通过稳压管的电流,则稳压效果不好.( )",{"answer":48,"createTime":5,"id":6,"options":49,"question":13,"source":25,"type":41},[],[8,9],{"answer":51,"createTime":17,"id":52,"options":53,"question":58,"source":25,"type":59},[],988748060,[54,55,56,57],"允许同时输入两个及以上的有效编码信号","所有的输入信号在底层电路设计时按优先权排序","日常应用中很少使用优先编码器","优先权最高的输入信号优先编码","下列属于优先编码器特点的选项有( )",1,{"answer":61,"createTime":17,"id":62,"options":63,"question":64,"source":25,"type":41},[],988748337,[8,9],"电路中参考点选得不同,各点的电位不同.( )",{"answer":66,"createTime":17,"id":67,"options":68,"question":69,"source":25,"type":41},[],988748704,[8,9],"在多级直耦放大器中,减小每一级的零点漂移都具有同等意义.( )",{"answer":71,"createTime":17,"id":72,"options":73,"question":74,"source":25,"type":41},[],988749482,[8,9],"占空比q是指矩形波高电平持续时间与其周期之比.( )",{"answer":76,"createTime":5,"id":77,"options":78,"question":79,"source":25,"type":41},[],988749909,[8,9],"磨擦是产生静电的主要途径,材料的绝缘性越差,越容易使其磨擦生电.( )"]