一青年近3天咳嗽，高热39℃，铁锈色痰，WBC18.5×109/L，X线胸片发现右肺中叶有大片阴影，临床诊断为大叶性肺炎，请问该致病菌的主要致病物质是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24326' and id < 2099214 and id<>'2099214' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24326' and id > 2099214 and id<>'2099214' order by id asc limit 5