包糖衣时，包隔离层的目的是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29784' and id < 2418472 and id<>'2418472' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29784' and id > 2418472 and id<>'2418472' order by id asc limit 5