[{"title":"( 2 个子文件 3.84MB ) 数学建模基础——王兵团 数学建模基础教材","children":[{"title":"王兵团 数学建模基础","children":[{"title":"目录.pdf <span style='color:#111;'> 42.00KB </span>","children":null,"spread":false},{"title":"正文.pdf <span style='color:#111;'> 4.06MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]