Solid foundation, suitable for students who have previewed new courses and mastered basic methods. It is suggested to use zero-error layered training. This workbook is from basic to improvement, with reasonable questions and moderate difficulty gradient, especially easy to make mistakes, which is indeed a place where students are prone to make mistakes. The disadvantage is that the overall difficulty is not great and it is suitable for consolidating the foundation.

At this stage, the difficulty is increasing. It is recommended to use a red tick and simply brush the questions. The difficulty is greater than zero error, and the number of questions is relatively large. Many high schools are using this workbook.

Near the college entrance examination, at this stage, for the party who brushes the questions, high school must brush the questions. Most of the questions in it come from simulation questions, which are the most difficult to ask in the market. No explanation, only answers, suitable for students with good foundation.