There is also going back to the textbook. Understand the basic concept theorem. There are only a few classes in high school mathematics. Set and logic, trigonometric function, vector and solid geometry are relatively simple in the college entrance examination and easy to review. These three questions must be won. Furthermore, series and functions are easy to review, but the difficulty of the questions fluctuates greatly, so it is recommended to look only at the basic questions. You only need to look at some basic examples to arrange combinations and probabilities, and you can give up if it is difficult. Limit and derivative, all the examples in the textbook are understood, so it is no problem to cope with the college entrance examination.
Come on, good luck! Improve the efficiency of review, and you will definitely get 90.