This question is very interesting. Let me answer this question. To put it simply, the college entrance examination questions never exceed the outline except the competition questions. In other words, although the background of the topic is some problems in advanced mathematics, the knowledge level of senior high school students can be completely solved. But, as you all know, I understand the so-called truth. I won't do that. In fact, many high school students can't skillfully use their own knowledge to solve such problems with advanced mathematics background. Actually, this is normal. A lot of high school knowledge can do this kind of problem. However, it either needs a delicate structure or can understand the essence of the problem. However, if you understand the essence of the problem, you will probably have understood it before you feel simple. Therefore, as far as the college entrance examination questions are concerned, I don't think there are super-classes, or very few. For example, I took the limit of series in the final exam of college entrance examination mathematics, but we didn't study it. This is the super classroom! Generally speaking, the "transcendence" of the college entrance examination questions is only your personal opinion. In most cases, it can be solved by what you have learned. For example, I have encountered very few cases of cheating. As for the self-theme of cities and schools, the phenomenon of transcendence occurs from time to time. However, the standard answer will also give an elementary solution. So it is also very difficult for high school students. It is not easy for you to ask him to come up with an elementary proof of such a topic in 10- 15 minutes. As for the superclass method, every region is different. L'H?pital law was allowed in Jiangsu a few years ago, but now it has grown long and faded. In fact, this mainly depends on the spirit of the provincial recruitment document. What is said above, what is to be done below. Having said that, I also want to share with you a college entrance examination question with the background of advanced mathematics.