（       ） 是按系统运行状况， 将一天 24 小时划分为若干个时段， 每个时段按系统运行的平均边际成本收取电费。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69629' and id < 4513216 and id<>'4513216' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69629' and id > 4513216 and id<>'4513216' order by id asc limit 5