某报告厅有20排座位，后一排比前一•排多2个座位，最后一排有8()个座位则这个报 告厅共有（ ）个座位。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31504' and id < 2524884 and id<>'2524884' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31504' and id > 2524884 and id<>'2524884' order by id asc limit 5