Unit 28

Unit 28 Monkey business LESSON 55 Some US scientists have shown that monkeys can be quite clever with money. In one study, the monkeys are given silver ‘coins’, and are taught to use them as money. They get the idea very fast. The monkeys can ‘buy' pieces of apple or pieces of banana. When a piece of apple costs the same as a piece of banana, the monkeys buy each fruit the same number of times. But when the apple pieces go 'on sale’, the monkeys lose interest in banana. They choosc apple, because they get more fruit for the same money. When pieces of cucumber were offered as well, one group of monkeys did something interesting. They didn't eat the cucumber pieces. They saw that the cucumber pieces were the same size as their silver coins. They hid the silver coins and tried to use the cucumber pieces as money. The scientists are very interested, but they are also getting a bit worried. They have discovered that the monkeys can become enthusiastic gamblers, too!

猴子的鬼把戏 一些美国科学家证实，猴子在和钱打交道时会表现得很聪明。在一项研究中，他们给了猴子一些银质“硬币”，并教它们如何把这些硬币当钱用，它们学得很快。猴子们能“买”苹果块和香蕉块。当一块苹果和一块香蕉价格一样时，它们买苹果和香蕉的次数就一样多。但是当苹果“减价”时，他们就对香蕉失去了兴趣。它们选择苹果，因为花同样多的钱可以得到更多的水果。 当黄瓜片也可以买到时，一组猴子的表现很是有趣。它们不吃黄瓜片。它们看出黄瓜片和银币一样大，就把银币藏起来，试图把黄瓜片当钱花。 科学家对此很感兴趣，但也有些担心。他们发现猴子也可以成为狂热的赌徒!

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