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. But a study by Sarach Brosnan and Frans de Waal of Emory University in Atlanta, 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, cooperative 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 for Dr. Brosnan"s and Dr. 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 (are 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 cooperative, group-living species. Such cooperation is likely to be stable only when each animal feels it is not being cheated. Feelings of righteous indignation, 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 for the common ancestor that the species had 35 million years ago, is, as yet, an unanswered question.

单选题______, the story of Snow White appeals to many adult readers, too. A. Though it written for children B. Though written for children C. Though for children written D. It was written for children

单选题A: Can I get you something to drink? B: ______

单选题 After the war, he worked on an island in the Pacific, helping the natives and medical ______ understand each other's behavior and cultures.

单选题The light is still on. Why not ______?

单选题What do we learn about deserts from this text?

单选题Help will come from the UN, but the aid will be ______ near what's needed.

单选题The organ transplant community has______humans and monkeys for ethical reasons.

单选题The population in last area was growing rapidly. Needless to say, the housing problem there cried out for immediate solution.

单选题I don"t know whether what she said is true, but I"ll try to ______ it.

单选题 Nowhere in nature is aluminum found free, owing to its always ______ with other elements, most commonly with oxygen.

单选题He gives ______ to his anger by kicking chairs.

单选题After working for six months on end, employees______ to paid-holidays.

单选题He ______ the job because it involved too much traveling.

单选题The rocks are very big with______ of colors on them.

单选题The car costs ______ the other one.

单选题A: Hello. Customer Service. What can I do for you?B: Yes. There's something wrong with my electric oven. It doesn't work now.A: All right. May I have your telephone number and address?B: ______

单选题Falling sales and rising overheads have obliged the company to review each customer"slimit. ______

单选题The houses in this area were all erected in ______ of housing regulations.