数据流图的基本符号包括数据流、加工、数据存储文件和（

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='28852' and id < 2351216 and id<>'2351216' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28852' and id > 2351216 and id<>'2351216' order by id asc limit 5