问

问题如下：

Country A and Country B both produces beer and shoes. It is known that Country A has comparative advantage in producing beer while Country B has comparative advantage in producing shoes. Which of the following is most appropriate?

选项：

A.

Country A should export beer and Country B should export shoes.

B.

Country A has higher opportunity cost in producing beer than Country B.

C.

Country B are more specialized in producing beer than Country A.

解释：

A is correct. Country A has comparative advantage in producing beer, in other words, it has lower opportunity cost or more specialized in producing beer than Country B. Therefore, it should export beer instead of shoes.

考点：比较优势

解析：A国在啤酒生产方面具有比较优势，即其生产机会成本较B国低，或者生产啤酒的专业程度较B国高。因此国应该出口啤酒给B国。同理B国应该生产、出口鞋子。