RC电路的时间常数:=C/R.（）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32672' and id < 2599031 and id<>'2599031' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32672' and id > 2599031 and id<>'2599031' order by id asc limit 5