Hehe, there is no answer online. I suggest you do every question carefully, and the correct answer is if you get it right. If you are not sure, you can discuss it with your classmates or ask the teacher.

Thinking about doing problems will be more impressive and your grades will improve quickly! Insist on doing every topic, especially pay attention to the process of doing it and master the methods.

The optimized design of junior high school, with lectures and exercises, is very suitable for self-study and improving grades. I wish you pass and get the ideal scores and grades!