太阳黑子以几年为一活动周期（）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27107' and id < 2247588 and id<>'2247588' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27107' and id > 2247588 and id<>'2247588' order by id asc limit 5