1.According to the theory of comparative advantage , specialization and free trade will benefit (A)all trading parties under certain circumstances (B)all trading parties, even when some are absolutely more efficient producersthan others. (C)only that trading party that has an absolute advantage in the production of all goods. (D)only that trading party that has a comparative advantage in the production of all goods. 想法：这边的party 是指国家吧 !? 依比较利益进行贸易，两国都有利益，但是 (A)跟(B)有什麽不同 ?? 22.The demand curve faced by a monopolistic competitor islikely to be (A)less elastic than the demand curve faced by a perfectly competitive firm and less elastic than the demand curve faced by a monopoly. (B)less elastic than the demand curve faced by a perfectly competitive firm and more elastic than the demand curve faced by a monopoly. (C)more elastic than the demand curve faced by a perfectly competitive firm and less elastic than the demand curve faced by a monopoly. (D)more elastic than the demand curve faced by a perfectly competitive firm and more elastic than the demand curve faced by a monopoly. 想法：完全竞争厂商面对的需求弹性会大於独占性竞争，但是独占性竞争跟独占厂商的 关系是 ?? --

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