The roll-off rate of a second order filter is （ ）.
A、60 dB/decade or 18 dB/octave
B、40 dB/decade or 12 dB/octave
C、20 dB / decade or 6 dB/octave
D、0 dB/decade or 0 dB/octave
发布时间：2025-07-14 16:07:04
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答案：40 dB/decade or 12 dB/octave
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