A.精度低B.易受干擾影響C.成本高D.結(jié)構(gòu)簡(jiǎn)單
A.正實(shí)軸 B.負(fù)實(shí)軸 C.原點(diǎn) D.虛軸
A.0 B.-20dB/dec C.40dB/dec D.-60dB/dec