Preview Chapter 1-2 of the textbook(《 英语学术论文写作 》 后简称 《 学术 》) and PPT of next class and answer the following questions by your own PPT. 1. What are the principles for choosing a topic? 2. What methods are usually used to select a topic? 3. How to narrow down a title? 4. What are the principles to formulate final titles? 5. What is the format for a title? And what are rules for it?