Needless to say, you are a sports major. I don't know if you have studied the principles of chemical engineering. If not, or the chemical engineering foundation is not good, it is recommended to take the microbiology test.

As for the reference books, I was teaching with a math class of our school teacher, using the textbook compiled by him, with real questions. Li Yongle's line generation is good, but English, I just pretend to be the real question. You'd better read that real book. English is a long process, and it needs constant practice to be effective. I reported the food in Ren Rufen and talked about politics with Ren Rufen's book, and I felt very good. Actually politics is about my own understanding. As for specialized courses, we should look at real questions and read books, such as Zhou Deqing's, and don't use other reference books.