题目内容
In a digital signal, the information is encoded as a set of discrete values.
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Demodulation is the act of extracting the original information signal from a modulated carrier wave.
The FM band has become the choice of music listeners because of its high-noise, wide-bandwidth qualities. It is also used for the audio portion of a television broadcast.
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人生的路虽然漫长，但紧要处只有几步，而恋爱正是其中关键一步。
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