若最简真分数的分母是8,这样的最简真分数一共有（     ）个

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27159' and id < 2250213 and id<>'2250213' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27159' and id > 2250213 and id<>'2250213' order by id asc limit 5