两个顺序栈共享一个内存空间时，当（）时才溢出。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30251' and id < 2447160 and id<>'2447160' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30251' and id > 2447160 and id<>'2447160' order by id asc limit 5