If China Normal University is hard to buy, it is recommended to buy an enhanced version. There are many basic questions in the regular edition, and the last few questions are a little competitive. The enhanced version does not have many questions, but it is more difficult and the answering process is more detailed.

Personally, physics thinks it's good to have a book called "Synchronous Curriculum Practice", which contains both basic questions and improvement questions. If it is not difficult enough, you can consider buying a "five-star question bank", but personally, if you don't add physics, there is no need to work so hard.

Chemistry, China Normal University is good, others have not been bought, so the recommended range is not wide.

I suggest that when you go to the bookstore to buy, you can ask the sales staff, who should know best what books to buy, or ask the teacher which books are more suitable for you.