1. Prepare markers of various colors and notes in the book, and outline what is important and what is in the exam, giving people an eye-catching feeling. When there are many events in the same period, they can be written together, which is convenient for centralized comparison and review, and also convenient for memory. If there are too many events and too few blanks, you can also write with post-it notes or use a variety of notes.

2. liberal arts students are students who study liberal arts compared with science students. The main subjects of liberal arts students are Chinese, mathematics, English, politics, history and geography, supplemented by physics, chemistry and biology.