呼吸链的主要成分分布在（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29826' and id < 2420718 and id<>'2420718' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29826' and id > 2420718 and id<>'2420718' order by id asc limit 5