Let's find some typical problems to do first. Many questions can't be brushed, so brush the simple ones first and master the basic formulas first. For example, series, trigonometric function, solid geometry, in any case, are the types that the college entrance examination takes almost every year. If you practice repeatedly, you can only practice first. If you encounter a foundation in the exam, you can patiently strive for the score you deserve and do whatever you want. Of course, you must remember the basic formulas and questions. Memory is very important. If you don't remember anything, it's up to you.