Required 1: Chapter 1, the rest of the functions must be familiar with the basic concepts, and the exam will be the key compulsory 2: Chapter 3: Straight line sum equation, Chapter 4: Circle sum equation is the key compulsory 3: Statistics and probability should be mastered. Compulsory 4: Triangle is more important. I am a fresh high school graduate, and these are the key points of the college entrance examination. In addition, it is also very important to do the questions.