Joke Collection Website - Joke collection - Ask the video and electronic handout of Li Yongle high school mathematics?

Ask the video and electronic handout of Li Yongle high school mathematics?

Link:/s/1zjvfj3hkuzd1rgcz-av3rw

Extraction code: ngcd? A series of popular science videos produced by Teacher Li Yongle and jointly produced by Watermelon Video and Popular Science China have spread all over the Internet, and CCTV News and People's Daily have forwarded them for praise.