I am a science student in Baoding No.1 Middle School (the elective courses of some subjects are different when we are preparing for the exam). I am a sophomore this year. The order of mathematics is: compulsory 1 → compulsory 4 → compulsory 3 → compulsory 2 → elective 2- 1→ elective 2-2. I have learned it so far. Chinese compulsory course 1 → 2 → 3 → 4 → 5 → Examination of ancient poetry appreciation → Examination of pre-Qin hundred schools of thought. I have learned it so far. English is to learn to the end, and I am currently taking seven courses. Physics required 1 → required 2 → elective 3- 1→ elective 3-2. I have learned it so far. Compulsory Chemistry I → Compulsory Chemistry II → Elective Chemical Reaction Principles → Elective Organic Chemistry. I have learned it so far. After biology, it is compulsory one → compulsory two → compulsory three → elective one (biotechnology practice).