The annual national mathematical modeling competition for college students is divided into two groups: undergraduate group and specialist group. A, b*** undergraduates do it; C, d*** college students do it, but even in the same group, the topics are different: A and C are more suitable for science and engineering students. B and d are more suitable for liberal arts students.
The topics of the competition involve all disciplines such as literature, science, engineering and medicine. Choose one of the six big topics from A to F, and each big topic contains three or four small topics. Choosing a topic is very important, and the difficulty of each topic is different. Some topics seem simple, and when you do it, you will find that simple models can't solve the problem perfectly, so the paper suddenly can't be written. Change the subject carefully. First, time is not allowed, and less time is not dominant. Second, changing the subject may not work.
The beginning of these questions involves the skill of topic selection, but there is no fixed routine for this skill. After all, every year, all topics, including questions, will change greatly. Conduct basic simulation training according to interests and expertise.