1, some students are about to face the exam. The questions in it are not only the choice of real questions, but also some questions that change according to real questions, which is very helpful for some students who need to review before the exam.

2. Both the classroom exercise book and the classroom exercise have been improved, with one focusing on the foundation and the other on the improvement. Class exercise books are really basic, and they are all in textbooks. Students with poor foundation can practice more, and classroom practice is an improvement for students who have mastered the basic content.