下列结构中，对尿素通透性最髙的部位是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29020' and id < 2361617 and id<>'2361617' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29020' and id > 2361617 and id<>'2361617' order by id asc limit 5