为减小系统负荷变化所引起的频率波动，应采取的措施是(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id < 4498458 and id<>'4498458' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id > 4498458 and id<>'4498458' order by id asc limit 5