https://open.163.com/newview/movie/free?pid=M99VJQ6JN&mid=M9A04DIA9
http://cms-bucket.ws.126.net/2022/0812/bf873c67j00rghxks000nc000ow009vc.jpg
信息论
https://open.163.com/newview/movie/free?pid=MD5AV5V7E&mid=MD5AVMM8D
http://cms-bucket.ws.126.net/2022/0805/3eb4b501j00rg4xqh000yc000ow009vc.jpg
可汗学院：保健与医学
https://open.163.com/newview/movie/free?pid=MDDK5PCBN&mid=MDDK5UA42
http://cms-bucket.ws.126.net/2022/0729/fd12ac31j00rfryh9000lc000ow009vc.jpg
可汗学院：美国公民
https://open.163.com/newview/movie/free?pid=M95SNFJNO&mid=M95SNRA3M
http://cms-bucket.ws.126.net/2022/0722/771e34b8j00rff4900018c000ow009vc.jpg
可汗学院：公元400年前的古代艺术
https://open.163.com/newview/movie/free?pid=MF8979987&mid=MF897IBTC
http://cms-bucket.ws.126.net/2022/0715/848955dbj00rf25af0011c000ow009vc.jpg
可汗学院：音乐课
https://open.163.com/newview/movie/free?pid=M99VHN7G4&mid=M9A00VMQG
http://cms-bucket.ws.126.net/2022/0708/7b792f91j00rep658001cc000ow009vc.jpg
可汗学院：古代中世纪史
https://open.163.com/newview/movie/free?pid=M82IBC067&mid=M82Q19NBF
http://cms-bucket.ws.126.net/2022/0701/5ec77705p00rec46m0033c000ow009vc.png
可汗学院：几何学-角
