苯两酮尿症的发病是由于哪种物质的代谢 障碍所引起的

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='28728' and id < 2343376 and id<>'2343376' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28728' and id > 2343376 and id<>'2343376' order by id asc limit 5