[{"title":"( 5 个子文件 63KB ) 西北工业大学数学建模B题求解","children":[{"title":"数学建模心得征文2010.doc <span style='color:#111;'> 33.00KB </span>","children":null,"spread":false},{"title":"竞赛注意事项.doc <span style='color:#111;'> 29.00KB </span>","children":null,"spread":false},{"title":"B题(送货线路设计问题)","children":[{"title":"送货线路设计问题.doc <span style='color:#111;'> 326.00KB </span>","children":null,"spread":false}],"spread":true},{"title":"数学建模竞赛摘要页.doc <span style='color:#111;'> 19.50KB </span>","children":null,"spread":false},{"title":"数学建模竞赛封面.doc <span style='color:#111;'> 29.50KB </span>","children":null,"spread":false}],"spread":true}]