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【多选题】

联通电视机顶盒红外遥控器无法操控机顶盒,可能的原因有:()

A.
遥控器电池没电
B.
遥控器没有对准机顶盒前面板
C.
机顶盒“死机”
D.
遥控器按键坏
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参考答案:
参考解析:
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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】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