[{"title":"( 2 个子文件 24.17MB ) 数据库系统概念(机械工业)第六版答案(全覆盖)","children":[{"title":"数据库系统概念(机械工业)第六版答案(覆盖全)","children":[{"title":"数据库实践习题解答.rar <span style='color:#111;'> 12.45MB </span>","children":null,"spread":false},{"title":"数据库习题答案.rar <span style='color:#111;'> 12.57MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]