The law of comparative advantage indicates that mutually beneficial international trade can take place only when______.

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问题 The law of comparative advantage indicates that mutually beneficial international trade can take place only when______.

选项 A、tariffs are eliminated
B、relative costs of production differ between nations
C、transportation costs are almost zero
D、a country can produce more of some product than any other nation can

答案B

解析 答案为B项。comparative advantage“比较利益”。该学说认为只要两国的劳动生产率在不同产品存在区别,便能从相互间的国际分工和彼此贸易中获得利益。故本题选B项。
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