file:jhnew-g1-ph-11-c-13-2-lyl-500-hd-g-32FD63933D47F4C2DBA635F34EB8F93E.mp4 file:g1-ph-11-c-13-lyl.pdf file:jhnew-g1-ph-11-c-10-2-a-lyl-500-hd-20E7E0BB36DB1B675EC94ADF52EFE2AB.mp4 file:1_2从“学会”到“会学”.wmv file:7_2机械振动（三） Nov 12 (wmr).wmv file:8-2机械能守恒定律3.wmv file:5-3天体运动3.wmv