Because:

1) concept and basic properties are the most important. Textbooks describe the basic concepts and properties most correctly and clearly (even if they are different from reference books, the exam is based on textbooks). Look at the concept description and theorem derivation of textbooks and do examples of textbooks repeatedly. In this way, you can have a clear understanding of the concept, at least with a passing score of+10. The current reference materials are mixed, and even many of them are different from textbooks, with wrong questions, which not only wastes time, but may even mislead themselves.

2) Do textbook examples and homework after class. These topics are relatively simple and won't waste too much time. At the same time, they will have a clear explanation of the basic concepts and nature. In fact, many students whose grades are not very good are often not familiar with odd function's definition, the definition of even function, f(x)=-f(-x), f(x)=f(-x), and inexplicably recite that odd function multiplied by odd function is even function, which is unreasonable. If you are proficient in the homework after class, you can basically memorize it, at least the NMET Mathematics 120.

3) Sort out the previous mistakes, write them down in a notebook and read more. We must not ignore the mistakes in previous exams and homework. If you have time, copy them down with a notebook and sort out the knowledge points. You must not make any mistakes in the future. This is a very important aspect. I always see many students buy a lot of reference materials, but they often pass after doing it once, and even haven't done many topics. They have done simple and capable questions in the material, and they will definitely not get high marks. Actually, you don't need too many reference materials. As long as you really understand the homework and exam questions, you can write them down and sort them out. Do it a few times in the future and you will know all the knowledge points. This not only saves time and effort, but also gets twice the result with half the effort.

4) If you have more time, do some previous GK questions. Why don't I say reference materials? Because there are too many unscrupulous merchants now, it is too difficult to choose the right reference materials and the quality cannot be guaranteed. The previous GK questions not only ensured the mastery of knowledge points, the difficulty and the correct rate of answers. So when you have time, just do a few GK questions, and you don't need too much. Before GK, GK questions were easy to do in recent years:) Questions that can't be done should also be sorted according to (3) ~ ~ In this way, if the GK with general difficulty is not 130, you can ask me for responsibility ~ If you want to be higher, you must be talented and diligent ~ (I don't know why it is not good to write the "College Entrance Examination" several times, so I have to use GK. . . )

Good luck ~