基础研究是整个科学体系的源头， 是所有技术问题的总开关 。 (       )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69634' and id < 4513669 and id<>'4513669' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69634' and id > 4513669 and id<>'4513669' order by id asc limit 5