A.
increase their commitment to research and development.增加他们对研发的投入。
B.
adopt policies that promote strong competition within domestic markets.采取促进国内市场竞争的政策。
C.
cannot benefit from trade when they do not differ in resource endowments or technology.如果它们在资源禀赋或技术方面没有差异,就不能从贸易中获益。
D.
may benefit from trade even when they do not differ in resource endowments or technology.即使它们在资源禀赋或技术上没有差异,也可能从贸易中获益。