file:展晨-小学奥数交流Q群.txt file:小学奥数赠品.zip file:知识点.mp4 file:讲义.doc file:6行程之简单行程问题.mp4 file:讲义几何之简单直线型面积.doc file:1-2组合之简单抽屉原理.mp4 file:1-2应用题之工程问题.mp4 file:6.数论只质数和合数.mp4 file:5计数之组合.mp4