经脱羧基作用后生成7-氨基丁酸的是（    ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27519' and id < 2271249 and id<>'2271249' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27519' and id > 2271249 and id<>'2271249' order by id asc limit 5