A. 生产不可能区域 B. 生产可能区域 C. 生产有效率区域 D. 生产无效率区域
A. only the very wealthy can get everything they want. B. firms will be forced out of business. C. the availability of goods will be limited but the availability of services will not. D. people must make choices.
A. 需求曲线向左方移动 B. 供给曲线向左方移动 C. 需求曲线向右方移动 D. 供给曲线向右方移动
A. 对 B. 错