下列说法中，可以提高发电机储备系数的是(  )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69516' and id < 4503580 and id<>'4503580' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69516' and id > 4503580 and id<>'4503580' order by id asc limit 5