下列选项中，属于补体系统的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29809' and id < 2419251 and id<>'2419251' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29809' and id > 2419251 and id<>'2419251' order by id asc limit 5