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【单选题】
It is helpful to illustrate these points by looking at the case of the United States, precisely because 3.__________. Coal, copper, iron, silver, and nickel are just a few of the natural resources the United States possesses in large quantities that other countries do not possess. There are some economically essential goods, such as tungsten and oil, which the United States either does not produce at all or does not produce in sufficient quantities to serve domestic needs at a reasonable price.A.
countries need to - or choose to import at least some goods and services
B.
different countries have comparative advantages on different products
C.
exports are also more than just an outlet for “ excess ” production
D.
it has the capability of producing the goods or supplying the services
E.
it comes closer to being self-sufficient than most other countries
F.
sell goods or services to other countries at prices higher than the prices
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