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现有模拟信号频率范围为0Mhz~10Mhz,根据奈奎斯特采样定理,采样频率必须大于()Mhz才能保证信号不失真;若采用QPSK进行调制,则传输的最大数据速率为(请作答此空)Mbps。
A.16
B.20
C.32
D.40

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