在如图所示电路中，当变阻器R3的滑片P向b端移动时（       ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='15519' and id < 2637546 and id<>'2637546' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='15519' and id > 2637546 and id<>'2637546' order by id asc limit 5