下列属于天然高分子材料的囊材是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30788' and id < 2479355 and id<>'2479355' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30788' and id > 2479355 and id<>'2479355' order by id asc limit 5