题目内容
能发生Gibb反应的香豆素类成分具有的结构特征为
2021-12-16
A.3位OH
B.4位无取代
C.5位OH
D.6位无取代
E.7位无取代
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='29711' and id < 2412957 and id<>'2412957' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29711' and id > 2412957 and id<>'2412957' order by id asc limit 5