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The sampling theorem shows that all values of a signal can be determined by sampling the signal at a rate （ ）to at least twice the bandwidth.
A. according
B. equal
C. reach
D. attach
参考答案:
B
详细解析:
抽样定理表明，信号的抽样频率至少为信号频率的2倍时，信号才能全部恢复。
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