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单选题

When a machine analyses the frequencies used by a particular voice and draws a _____ of them, sound is converted into a pattern of lines.

Afigure

Bgraph

Cpicture

Ddiagram

正确答案:A (备注:此答案有误)

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  • 单选题

    When a machine analyses the frequencies used by a particular voice and draws a _____ of them, sound is converted into a pattern of lines.

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