题目内容
已知无源二端网络,端口电压时,端口电流,其等效阻抗为( )。
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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68474' and id < 4421081 and id<>'4421081' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68474' and id > 4421081 and id<>'4421081' order by id asc limit 5