Last year, I participated in the National College Entrance Examination for Science, and I didn't get ***490 points in math. But the fact is that my total score is only 554. At the beginning, because my parents didn't allow me to apply for the agricultural major, I filled in an ace major in an ordinary book (named * * University of Information Engineering) with the classification of science and engineering. What's more, the difficulty of high numbers and linear algebra has increased since our session. About 40 days after the official start of school, the gap between people in professional learning has widened. As far as my major is concerned, the partial derivative, multiple integral, curve integral and Fourier series in the freshman high number A are all very important. Sophomore students have to learn fluid mechanics and mathematical physics methods, which they use the most. If you don't understand these two courses, you can't take the following specialized courses. The problem is that I can't finish every class in the space when I re-integrate! ! ! Preview before class, read it four or five times after class, but I still can't understand it! Homework is copied and handed in.