There are many problems with moderate difficulty in mathematics for postgraduate entrance examination, so we must pay attention to the solid review of basic concepts, theorems and formulas, and refer to Tang Jiafeng -20 17 Mathematics II. After the foundation is laid, the follow-up review will be much smoother. After laying a good foundation, students should pay attention to the practice of real questions and do them again and again. Teacher Tang's math relay problem is 1800, which is very good. Sort out the thinking and skills of answering questions and do some simulation questions appropriately.