动态电路的三要素是指初始值、稳态值和时间常数。(     )   

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68473' and id < 4421037 and id<>'4421037' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68473' and id > 4421037 and id<>'4421037' order by id asc limit 5