婴儿出生后就会吮吸母乳。这种现象属于( )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26189' and id < 2193941 and id<>'2193941' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26189' and id > 2193941 and id<>'2193941' order by id asc limit 5