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【单选题】Everybody loves a fat pay rise. Yet pleasure at your own can vanish if you learn that a colleague has been given a bigger one. Indeed, if he has a reputation for slacking, you might even be outrageD、Such behaviour is regarded as" all too human", with the underlying assumption that other animals would not be capable of this finely developed sense of grievance.But a study by SarahBrosnan and Frans de Waal ofEmory University inAtlanta, Georgia, which has just been published in Nature, suggests that it is all too monkey, as well.The researchers studied the behaviour of female brown capuchin monkeys. They look cute. They are good-natured, co-operative creatures, and they share their food readily.Above all, like their female human counterparts, they tend to pay much closer attention to the value of "goods and services" than males.Such characteristics make them perfect candidates forDr.Brosnan’’s andDr. de Waal’’s study. The researchers spent two years teaching their monkeys to exchange tokens for fooD、Normally, the monkeys were happy enough to exchange pieces of rock for slices of cucumber. However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behaviour became markedly different.In the world of capuchins, grapes are luxury goods (and much preferable to cucumbers). So when one monkey was handed a grape in exchange for her token, the second was reluctant to hand hers over for a mere piece of cucumber.And if one received a grape without having to provide her token in exchange at all, the other either tossed her own token at the researcher or out of the chamber, or refused to accept the slice of cucumber. Indeed, the mere presence of a grape in the other chamber (without an actual monkey to eat it) was enough to induce resentment in a female capuchin.The researchers suggest that capuchin monkeys, like humans, are guided by social emotions. In the wild, they are a co-operative, group-living species. Such co-operation is likely to be stable only when each animal feels it is not being cheateD、Feelings of righteous ndignation, it seems, are not the preserve of people alone. Refusing a lesser reward completely makes these feelings abundantly clear to other members of the group. However, whether such a sense of fairness evolved independently in capuchins and humans, or whether it stems from the common ancestor that the species had 35 million years ago, is, as yet, an unanswered question.What can we infer from the last paragraph
A、Monkeys can be trained to develop social emotions.
B．Human indignation evolved from an uncertain source.
C．Animals usually show their feelings openly as humans do.
D．Cooperation among monkeys remains stable only in the wilD、

网考网参考答案：B
网考网解析：
B．是“人类的愤怒的起源不为人知”，可以从本段的最后一句得知。“但是，这种要 求公正对待的感觉是从卷尾猴和人类身上单独各自进化而来，还是起源于3500万年 以前两者共同的祖先，目前还没有一个肯定的答案”。A．是“可以训练猿猴培养社会 感情”；C．是“动物通常像人一样公开表露感情”。注意这儿用的是animals，范围太 广，所以错了。D．是“猴子们的合作只有在野生情况下才稳定”。这句话是文中直接 提到的，并不是推论出来的，加之原句中还有一个条件，“当大家都感到没有受骗 时”，所以D．是不正确的。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>