Chickens slaughtered in the United States, claim officials in Brussels, are not fit to grace Europea

题目

Chickens slaughtered in the United States, claim officials in Brussels, are not fit to grace European tables. No,say the Americans: our fowl are fine, we simply clean them in a different way.
As it happens, a razor that is safe in Europe is unlikely to electrocute Americans.
The Americans would happily reach one accord on standards for medical devices and then hammer out different pacts covering, say, electronic goods and drug manufacturing.
这是新概念4第8课中的内容,都使用Americans .Americans 和American 在指美国人时有什么区别啊
American难道还不能指代全体美国人吗？非得用复数？

答案

当然不能,那是单数