单项选择题 U.S. dollars are an example of commodity money and hides used to make trades are an example of fiat money. A、正确 B、错误

判断题 系统经过一个循环过程，过程的热和功都一定是0。 正确 错误

多项选择题 It’s not surprising, then, that business decisions are arrived ________ in a different way from in the West. Westerners often expect an Asian to make a quick decision or to treat a current ________ on its present merits, irrespective of what has happened in the past. A、at B、on C、deal D、decision