Hello, students can open the link:/Click on the upper right corner to log in and enter the account password given by the teacher. If the teacher doesn't give it to you, you can ask the teacher for it (Google, 360, sogou, Firefox, UC browser are recommended, and IE browser is not allowed), so you can learn on your mobile phone without any download and installation. Students can use the introduction video:/v _ show/id _ xmzg1nzkmzim0ma = =. html。 You can also enter the login account password to study for the exam, which is more convenient.