由两分子苯丙素衍生物聚合而成的天然化合物称为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30714' and id < 2474587 and id<>'2474587' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30714' and id > 2474587 and id<>'2474587' order by id asc limit 5