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AM pop was the dominant sound of Top 40 AM radio during the 1960s and '70s. At the beginning of the '60s, AM radio was by ...

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radio technology there are two popular modulation techniques, amplitude modulation and frequency modulation. These give us the familiar AM ...

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What are you doing now?I am (listening) to the radio.Are you (reading) books?No,I am (doing) my homework.

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