感应电动机正常工作时的转速略低于同步转速。（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69467' and id < 4499442 and id<>'4499442' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69467' and id > 4499442 and id<>'4499442' order by id asc limit 5