下图所示电路中，供出功率的电源是（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id < 4500027 and id<>'4500027' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id > 4500027 and id<>'4500027' order by id asc limit 5