High school can not be serious, and universities must be serious.
In high school, the teacher instilled in you that college basically depends on self-study.
There are many kinds of exercises in high school, but only in textbooks in college.
High school is basically about what to learn and what to test, at least one question type. When the university arrives at the exam, it will feel very confused and don't know what to test.
Anyway, when you get to college, you will know that many things are different. From the aspect of study style, you can see that many people are degenerate.
In terms of thinking, well, I don't know, for example, in our advanced algebra, the teacher lectures a little east and a little west, and rummages through the textbooks to find out where he speaks.
I am a math major, and other majors study math. Most calculus and advanced mathematics, calculus, my classmate said that it can be basically solved with high school knowledge, and advanced mathematics is not very clear. However, the Internet says that Shu Gao is a very tall tree, and many people hang on it.