投入一次调频的发电机组，其有功功率随着频率的(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id < 4498517 and id<>'4498517' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id > 4498517 and id<>'4498517' order by id asc limit 5