[{"title":"( 7 个子文件 2.54MB ) 工程数学—概率统计简明教程","children":[{"title":"概率","children":[{"title":"概率第4章.ppt <span style='color:#111;'> 1.66MB </span>","children":null,"spread":false},{"title":"概率第7章.ppt <span style='color:#111;'> 1.21MB </span>","children":null,"spread":false},{"title":"统计.ppt <span style='color:#111;'> 619.50KB </span>","children":null,"spread":false},{"title":"概率第1、2章.ppt <span style='color:#111;'> 1.13MB </span>","children":null,"spread":false},{"title":"概率第3章.ppt <span style='color:#111;'> 713.00KB </span>","children":null,"spread":false},{"title":"概率第6章.ppt <span style='color:#111;'> 591.50KB </span>","children":null,"spread":false},{"title":"概率第5章.ppt <span style='color:#111;'> 1006.50KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]