1. According to different teaching methods, online (online) teaching or offline (face-to-face) teaching can be filled in.

2. Online education: Online education is e-learning, or distance education and online learning. The current concept generally refers to a learning behavior based on the network, similar to the concept of online training. 3. Offline teaching refers to the traditional teaching mode, which requires students to go to the classroom and face to face with teachers for one-to-many or one-to-one teaching. Because offline education can communicate directly with teachers in the classroom, it can play a supervisory role for students.

At present, there are two forms of education: online courses and offline lectures. Online courses and offline teaching have their own advantages, and the two teaching modes can complement each other. For example, online courses are more suitable for fragmented and solidified knowledge points; Offline teaching is more about experience sharing and practical interaction, which can directly hit the effect.