维果茨基认为，行为的工具分为两类，一类是物质工具，另一类是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30326' and id < 2451907 and id<>'2451907' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30326' and id > 2451907 and id<>'2451907' order by id asc limit 5