为了保证用户电压质量，系统必须保证有足够的(    )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id < 4498480 and id<>'4498480' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id > 4498480 and id<>'4498480' order by id asc limit 5