第12题:[单选题] Consider Figure 9.1. Compared to the market equilibrium position achieved by Sony Company and American Company as competitors, Venture Company as a monopoly leads to a deadweight loss of consumer surplus of: A. $2 B. $4 C. $6 D. $8 参考答案:A
第13题: [单项选择]使用外推法时() A. 预报时效不要太长 B. 应注意天气形势是否可能发生突变 C. A、B都对 D. A、B都错 参考答案:C