Hello, I have studied a lot about middle school teaching AIDS, and the middle point of the textbook is more difficult. The general topic is: easy and clever, difficult and complicated, difficult and difficult. In other words, most simple questions have ingenious places in them, and most difficult questions have complicated steps, and the difficulty distribution is separated according to the three seven. For the eighth grade, it is not recommended to use exam-oriented review materials, but they can be used for usual study and research.

I hope to choose the best and use it. I wish you success in your studies.