题目内容
香豆素类化合物的基本碳架为
2021-10-23
A.C6-C3-C6
B.C6-C6
C.C6-Cl-C6
D.C6-C2-C6
E.C6-C3
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='26288' and id < 2199078 and id<>'2199078' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26288' and id > 2199078 and id<>'2199078' order by id asc limit 5