1, the textbook helps to simplify knowledge, and the content of the design is simple and easy to understand, which is not suitable for extracurricular expansion. The textbook fully analyzes the content of the textbook and will be launched on the basis of the analysis.

2. The examples listed in the textbook are difficult, the analysis of the exercises is not comprehensive, and the students have little gain. The examples and exercises in the textbook are moderately difficult, with detailed exercises and mind maps. Therefore, the first year of high school has a complete solution to buying textbooks.