7247NRZ指的是()A.单极性归零码;B.单极性非归零码;C.双极性归零码;D.双极性非归零码;8370

NRZ指的是() A.单极性归零码; B.单极性非归零码; C.双极性归零码; D.双极性非归零码; 此题为多项选择题。请帮忙给出正确答案和分析,谢谢!

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