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【填空题】

在iTV业务安装组网中,MODEM与iTV机顶盒连线要求是:建议用五类双绞线制作,不超过()米,或用四芯电话线代替,芯线直径要大于0.4mm,最远距离不能超过30米。

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【单选题】数字电视机顶盒输出的信号是()。

A.
射频信号
B.
视频信号和音频信号
C.
中频信号
D.
数据信号

【单选题】下列哪个是WLAN网络建设中最常用的五类双绞线线序:()

A.
白棕,橙,白绿,白蓝,蓝,绿,白橙,棕
B.
白橙,橙,白蓝,白绿,绿,蓝,白棕,棕
C.
白橙,橙,白绿,蓝,白蓝,绿,白棕,棕
D.
白棕,棕,白绿,蓝,白蓝,绿,白橙,橙

【单选题】The Future of the BBC As a boy growing up in the 1930s in the Midlands, Norman Painting, the son of a railway-man, listened to a new radio service from the British Broadcasting Corporation. His mother...

A.
the BBC’s educative role for the working class
B.
the popularity of the BBC in the 1930s
C.
BBC’s influence on ordinary people’s career development
D.
the British’s love for the BBC and its justification for governmental support