I'm not taking the exam. I thought there was an outline. I am familiar with the mathematics of postgraduate entrance examination, and I can tell you responsibly that I must pay attention to the review of basic knowledge. Postgraduate entrance examination is becoming more and more basic, and the problem is nothing more than the synthesis of multiple basic knowledge. On the basis of reviewing the basic knowledge, do more real questions, because as a student, if you want to grasp the key points, you can only rely on the research of real questions. Five times is not much.