题目内容
Dogs have an understanding of fair play and become angry if they feel that another dog is getting a better deal, a new study has found.
The study looked at how dogs react when a companion is rewarded for the same trick in an unequal way. Friederike Range, a famous researcher, and her colleagues did a series of experiments with dogs who knew how to respond to the command “give the paw”. The dogs were normally happy to repeatedly give the paw, whether they got a reward or not.
But that changed if they saw that another dog was being rewarded with a piece of food, while they received nothing. The dogs hesitated significantly longer when obeying the command to give the paw. Eventually, the unrewarded dogs stopped cooperating.
Researchers always assumed that only humans pay close attention to unfairness. That changed in 2003 when Frans De Waal, a professor of psychology, and a colleague named Sarah Brosnan did a survey on monkeys. Monkeys had to hand a small rock to researchers to get a piece of cucumber(黄瓜) in return. However, the monkeys would suddenly become angry when receiving the piece of cucumber if they saw another monkey receive a more delicious reward, such as a grape, for doing the same job. The monkey that got the cucumber would eventually throw away the food and the rock, and would later just stop performing.
In that experiment, the monkeys considered the fairness of two different types of payment, but when Range and her colleagues did a similar study with their trained dogs, testing to see if dogs would become upset if they only got bread when other dogs received sausage, they found that dogs did not make that kind of subtle (细微的) distinction. As long as the dogs got some kind of food payment, even if it wasn’t the most delicious kind, they would play along.
【小题1】 The dogs refused to give their paws when they _____________________.
A.were given too much reward |
B.realized they received less food |
C.found another dog was given nothing |
D.felt they were being treated unequally |
A.the dogs obeyed the command happily |
B.the dogs waited for a reward |
C.the dogs hesitated to give the paw |
D.the dogs stopped cooperating |
A.they were being given the same type of food |
B.another monkey did much less work |
C.another monkey was offered tastier food |
D.other monkeys threw food and rocks |
A.enjoy playing interesting games with humans |
B.prefer to do the same jobs as humans |
C.pay little attention to the type of reward received |
D.aren’t sensitive to the stimulation (刺激) of food |
【小题1】D
【小题1】A
【小题1】C
【小题1】C
解析
Can dogs and cats live in perfect harmony in the same home? People who are thinking about adopting a dog as a friend for their cats are worried that they will fight. A recent research has found a new recipe of success. According to the study, if the cat is adopted before the dog, and if they are introduced when still young (less than 6 months for cats, a year for dogs), it is highly probable that the two pets will get along swimmingly. Two-thirds of the homes interviewed reported a positive relationship between their cat and dog.
However, it wasn’t all sweetness and light. There was a reported coldness between the cat and dog in 25% of the homes, while aggression and fighting were observed in 10% of the homes. One reason for this is probably that some of their body signals were just opposite. For example, when a cat turns its head away it signals aggression, while a dog doing the same signals submission.
In homes with cats and dogs living peacefully, researchers observed a surprising behavior. They are learning how to talk each other’s language. It is a surprise that cats can learn how to talk ‘dog’, and dogs can learn how to talk ‘cat’.
What’s interesting is that both cats and dogs have appeared to develop their intelligence. They can learn how to read each other’s body signals, suggesting that the two may have more in common than we previously suspected. Once familiar with each other’s presence and body language, cats and dogs can play together, greet each other nose to nose, and enjoy sleeping together on the sofa. They can easily share the same water bowl and in some cases groom (梳理) each other.
The significance of the research on cats and dogs may go beyond pets — to people who don’t get along, including neighbors, colleagues at work, and even world superpowers. If cats and dogs can learn to get along, surely people have a good chance.
【小题1】The underlined word “swimmingly” in Paragraph 1 is closest in meaning to “without _________”.
A.a message | B.a problem | C.introduction | D.delay |
A.they are cold to each other |
B.they look away from each other |
C.they misunderstood each other’s signals |
D.they are introduced at an early age |
A.They eat and sleep each other. |
B.They observe each other’s behaviors. |
C.They learn to speak each other’s language. |
D.They know something from each other’s voices. |
A.have common interests |
B.are less different than was thought |
C.have a common body language |
D.are less intelligent than was expected |
A.We should learn to live in harmony. |
B.We should know more about animals. |
C.We should live in peace with animals. |
D.We should learn more body languages. |