用碱水加热提取芸香苷时，为防止其氧化分解，通常会加入少量的

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30715' and id < 2474718 and id<>'2474718' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30715' and id > 2474718 and id<>'2474718' order by id asc limit 5