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调制调解器(modem)的功能是实现_____。
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调制调解器(modem)的功能是实现_____。
A、数字信号的编码
B、数字信号的整形
C、模拟信号的放大
D、模拟信号与数字信号的转换
时间:2021-09-01 16:40
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D
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