1. What is the English word for 数学Answer Mathematics.
2. What is the English word for 历史Answer History.
4. What is the English word for 化学Answer Chemistry.
5. What is the English word for 生物Answer Biology.
7. What is the English word for 政治Answer Politics.
8. What is the English word for 经济学Answer Economics.
9. What is the English word for 心理学Answer Psychology.