[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fpxvVACd8tw5-oKXdwjSE4KZFA1YpqQg8fOv_TfkYyls":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-06-26 18:04:38",155735774,[8,9,10,11],"同等作用距离下比 一次雷达所需功率小","干扰杂波较少","能识别飞机的身份和高度","不需要安装对应的机载设备",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"81d55575138313c496e7f17677027dc2","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F108928ddd33cab8b1083630d43f7ae95.png","通信导航监视设施","work_35709423","","下列选项中不属于二次雷达优点的是",[21,32,41,50,59,68,77,86,95,104],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],155735765,[25,26,27,28],"1000微秒","100微秒","1000毫秒","100毫秒","目标距离雷达150km,雷达发出电磁波到目标的往返时间是","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],155735766,[36,37,38,39],"降低探测距离、提高距离分辨力","降低探测距离、降低距离分辨力","提高探测距离、降低距离分辨力","提高探测距离、提高距离分辨力","雷达信号采用宽脉冲发射,而接收信号的时候用压缩法来获得窄脉冲的目的是",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],155735767,[45,46,47,48],"航路监视雷达","精密进近雷达","机场监视雷达","场面监视雷达","近程搜索雷达,覆盖半径100-150km,主要用于机场上空交通管制和导航,以上是哪一种民航一次雷达的特点",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],155735768,[54,55,56,57],"功率大,成本高","需要目标安装对应的应答设备","不能识别飞机的身份","不能较准确地显示飞机的高度","下列选项中不属于一次雷达缺点的是",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],155735769,[63,64,65,66],"民航一次雷达","民航二次雷达","民航一次雷达与二次雷达合装","S模式二次雷达","民航航管雷达指的是",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],155735770,[72,73,74,75],"961MH和1030MHz","1030MHz和961MHz","1090MHz和1030MHz","1030MHz和1090MHz","民航二次雷达的询问和应答频率分别是",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],155735771,[81,82,83,84],"3微秒","5微秒","8微秒","21微秒","二次雷达A模式询问信号中,P1和P3脉冲的间隔是",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],155735772,[90,91,92,93],"7700","7600","7500","7400","下列二次代码表示飞机通信设备失效的代码是",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],155735773,[99,100,101,102],"2434","6768","4534","2122","下列哪一项是不合法的二次代码",{"answer":105,"createTime":5,"id":6,"options":106,"question":19,"source":30,"type":31},[],[8,9,10,11]]