150, 75, 50, 37 .5, 30,（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30975' and id < 2491709 and id<>'2491709' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30975' and id > 2491709 and id<>'2491709' order by id asc limit 5