毒物进入人体最主要、最常见的途径是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30400' and id < 2457446 and id<>'2457446' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30400' and id > 2457446 and id<>'2457446' order by id asc limit 5