The simple comparative advantage model assumed that trade: 简单比较优势模型假设贸易:
A.
changes efficiency with which a country utilizes resources.改变一个国家利用资源的效率。
B.
changes a country's stock of resources.改变一个国家的资源存量。
C.
allows for dynamic changes in the marketplace.允许市场的动态变化。
D.
does not change a country's stock of resources.不会改变一个国家的资源存量。