If students want to learn a course well, they must first learn the core contents of this course (including audio-visual teacher's explanation, text description and picture materials, relevant cases, background materials, reference books or websites, thinking about problems, etc.). ); Then, through the analysis of examples and related cases, we can deeply understand the key knowledge, and expand our knowledge through background information and reference resources. In addition, in order to help students learn and achieve better learning results, many courses also set up special columns that reflect the characteristics of the course, such as interactive cases, excellent film reviews, audio and video appreciation and so on. Students can make reasonable use of it according to their own learning situation.