癌细胞对基膜的侵袭是一个主动过程，可分为下列哪几个步骤

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27432' and id < 2267820 and id<>'2267820' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27432' and id > 2267820 and id<>'2267820' order by id asc limit 5