对于发电机来说，同步电机的额定值为（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id < 4498950 and id<>'4498950' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id > 4498950 and id<>'4498950' order by id asc limit 5