Objectives A. To learn about what is Demand and Supply B. To identify the factors affecting prices C. To master the usage of key special terms,words and phrases in this chapter D. To grasp the main idea and the structure of the text E. To master the usage of key special terms,words and phrases in this chapter F To conduct a series of listening,speaking,reading, writing and translating activities concerned with the theme of the chapter 制价爱行蜀易大考Objectives Objectives A.To learn about what is Demand and Supply To learn about what is Demand and Supply B.To identify the factors affecting prices To identify the factors affecting prices C.To master the usage of key special terms, words To master the usage of key special terms, words and phrases in this chapter and phrases in this chapter D. To grasp the main idea and the structure of the text E. To master the usage of key special terms, words and phrases in this chapter F. To conduct a series of listening, speaking, reading, writing and translating activities concerned with the theme of the chapter