题目
题型：不详难度：来源：
The research team have discovered that subordinate fish voluntarily diet to avoid challenging their larger competitors. “In studying gobies we noticed that only the largest two individuals, a male and female, had breeding （繁殖） rights within the group,” explains Marian Wong. “All other group members are nonbreeding females, each being 5-10% smaller than its next largest competitor. We wanted to find out how they maintain this precise size separation.”
The reason for the size difference was easy to see. Once a subordinate fish grows to within 5-10% of the size of its larger competitor, it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not, the evicted fish is then eaten up.
It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish. Whether they did so voluntarily, by restraining how much they ate, was not clear. The research team decided to do an experiment. They tried to fatten up some of the subordinate gobies to see what happened. To their surprise, the gobies simply refused the extra food they were offered, clearly preferring to remain small and avoid fights, over having a feast.
The discovery challenges the traditional scientific view of how boss individuals keep their position in a group. Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves, so keeping their competitors small.
While the habits of gobies may seem a little mysterious, Dr. Wong explains that understanding the relationships between boss and subordinate animals is important to understanding how hierarchical （等级的） societies remain stable.
The research has proved the fact that voluntary dieting is a habit far from exclusive to humans. “As yet, we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature,” the researchers comment. “Data on human dieting suggests that, while humans generally diet to improve health or increase attractiveness, rarely does it improve long-term health and males regularly prefer females that are fatter than the females’ own ideal.”
小题1:When a goby grows to within 5-10% of the size of its larger competitor, it .
| A．faces danger | B．has breeding rights |
| C．eats its competitor | D．leaves the group itself |
| A．the fish beaten up | B．the fish found out |
| C．the fish fattened up | D．the fish driven away |
| A．fought over a feast | B．went on diet willingly |
| C．preferred some extra food | D．challenged the boss fish |
| A．Fish dieting and human dieting. |
| B．Dieting and health. |
| C．Human dieting. |
| D．Fish dieting. |
答案
小题1:A
小题2:D
小题3:B
小题4:D
解析
小题1:细节推断题。从第二段each being 5-10% smaller than its next largest competitor.可以判断出小于5 - 10%的未来最大的竞争对手。
小题2:词义判断题。由上句it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not，…可以推断出D的答案。
小题3:细节判断题。从第三段最后一句话中可知道，拒绝供给他们额外的食物，而保持小,避免战斗。故选B。
小题4:主题概括题。从文章中的一段和最后一段：研究已经证明了这一事实,节食是自愿的习惯远非人类。”
核心考点
试题【People diet to look more attractive. Fish diet to avoid being beaten up, thrown 】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Some people blame the fact that we are surrounded(包围)by shops selling unhealthy,fatty foods,such as fried chicken and ice cream,at low prices.This has turned out a whole generation of grown-ups who seldom cook a meal for themselves.If there were fewer of these restaurants,then probably children would buy less take-away food.
There is another argument that blames parents for allowing their children to become overweight.I agree with this,because good eating habits begin early in life,long before children start to visit fast food shops.If children are given fried chicken and chocolate rather than healthy food,or are always allowed to choose what they eat,they will go for sweet and salty foods every time,and this will carry on throughout their lives.
There is a third reason for this situation.Children these days take very little exercise.They do not walk to school.When they get home,they sit in front of the television or their computers and play computer games.Not only is this an unhealthy pastime(消遣)，it also gives them time to eat more unhealthy food.What they need is to go outside and play active games or sports.
The above are the main reasons for this problem,and therefore we have to encourage young people to be more active,as well as steering them away from fast food shops and bad eating habits.
小题1:According to the text,what kind of children may eat more unhealthy food?
| A．Those who often take exercise. |
| B．Those who often watch television. |
| C．Those who often have meals at home. |
| D．Those who often walk to school. |
| A．their parents often cook meals for them |
| B．they are too busy to go out and play |
| C．they can’t choose what to eat |
| D．there are too many fast food shops around |
| A．forcing | B．guiding |
| C．driving | D．moving |
| A．tell a story | B．provide facts |
| C．give advice | D．compare opinions |
Money can buy a degree of happiness.But once you can afford to feed,clothe and house yourself,each extra dollar makes less and less difference.
Researchers find that,on average,wealthier people are happier.But the link between money and happiness is complex.In the past half-century,average income has sharply increased in developed countries,yet happiness levels have remained almost the same.Once your basic needs are met,money only seems to increase happiness if you have more than your friends,neighbors and colleagues.
“Dollars buy status,and status makes people feel better,”conclude some experts,which helps explain why people who can seek status in other ways—scientists or actors,for example—may happily accept relatively poorly-paid jobs.
In a research,Professor Alex Michalos found that the people whose desires—not just for money,but for friends,family,job,health—rose furthest beyond what they already had,tended to be less happy than those who felt a smaller gap(差距).Indeed,the size of the gap predicted happiness about five times better than income alone.“The gap measures just blow away the only measures of income,”says Michalos.
Another factor that has to do with happiness is age.Old age may not be so bad.“Given all the problems of aging,how could the elderly be more satisfied?”asks Professor Laura Carstensen.
In one survey,Carstensen interviewed 184 people between the ages of 18 and 94,and asked them to fill out an emotions questionaire.She found that old people reported positive emotions just as often as young people,but negative emotions much less often.
Why are old people happier?Some scientists suggest older people may expect life to be harder and learn to live with it,or they’re more realistic about their goals,only setting ones that they know they can achieve.But Carstensen thinks that with time running out,older people have learned to focus on things that make them happy and let go of those that don’t.
“People realize not only what they have,but also that what they have cannot last forever,”she says.“A goodbye kiss to a husband or wife at the age of 85,for example,may bring far more complex emotional responses than a similar kiss to a boy or girl friend at the age of 20.”
小题1:According to the passage,the feeling of happiness______.
| A．is determined partly by genes |
| B．increases gradually with age |
| C．has little to do with wealth |
| D．is measured by desires |
| A．make them feel much better |
| B．provide chances to make friends |
| C．improve their social position |
| D．satisfy their professional interests |
| A．optimistic |
| B．successful |
| C．practical |
| D．emotional |
| A．the gap between reality and desire is bigger |
| B．they have a stronger desire for friendship |
| C．their income is below their expectation |
| D．the hope for good health is greater |
Doctors studying the human brain have given a number of examples of this amazing power of aphasics.Some have even compared this power to that of a dog with an ability to find out the drugs hidden in the baggage.
Recently,scientists carried out tests to see if all that was said about aphasics was true.THEY STUDIED A MIXED GROUP OF PEOPLE.Some were normal;others were aphasics.It was proved that the aphasics were far ahead of the normal people in recognizing false speeches—in most cases,the normal people were fooled by words,but the aphasics were not.
Some years ago,Dr.Oliver Sacks wrote in his book about his experiences with aphasics.He mentioned a particular case in a hospital.Some aphasics were watching the president giving a speech on TV.Since the president had been an actor earlier,making a good speech was no problem for him.He was trying to put his feelings into every word of his speech.
But his way of speaking had the opposite effect on the patients.They didn’t seem to believe him.Instead,they burst into laughter.The aphasics knew that the president did not mean a word of what he was saying.He was lying!
Many doctors see aphasics as people who are not completely normal because they lack the ability to understand words.However,according to Dr.Sacks,they are more gifted than normal people.Normal people may get carried away by words.Aphasics seem to understand human expressions better,though they cannot understand words.
小题1:What is so surprising about aphasics?
| A．They can fool other people. | B．They can find out the hidden drugs. |
| C．They can understand language better. | D．They can tell whether people are lying. |
| A．By asking them to watch TV together. |
| B．By organizing them into acting groups. |
| C．By comparing them with normal people. |
| D．By giving them chances to speak on TV. |
| A．What one says reflects how one feels. |
| B．Aphasics have richer feelings than others. |
| C．Normal people often tell lies in their speeches. |
| D．People poor at one thing can be good at another. |
Hundreds of young people between the ages of 20 and 45 died each week during the early years of the U.S. AIDS. More than 600,000 cases of AIDS have been reported since 1981 in the United States, and it is estimated that there may be as many as 900,000 Americans infected with HIV.
Though the rate of HIV infections continues to increase in the United States, the number of AIDS cases has fallen sharply since 1996, when antiretroviral drugs came onto the market. Unfortunately, the AIDS epidemic continues today in Africa and much of Asia, where antiretroviral treatment is not available and health care is far from enough. AIDS is the fourth leading cause of death worldwide, and the No. 1 cause of death due to infectious disease.
HIV, the virus that causes AIDS, was first separated in 1983 by a team at the Pasteur Institute in Paris. That discovery made it possible to develop a test for AIDS and trace back to victims who may have died before doctors were aware of the disease.
However, scientists still don"t know exactly how and where AIDS started. Finding the source of AIDS could be important in developing a vaccine(疫苗) and be important in mapping the future course of the epidemic.
小题1:It can be inferred from the passage that
A．antiretroviral drugs will be obtained easily all over the world
B．the best way to stop AIDS is to develop a vaccine
B．scientists will soon find a way to cure AIDS
D．there will be fewer AIDS cases in the world in the future
小题2:Which areas are the most worrying places where AIDS spreads quickly?
| A．Africa. | B．Asia. | C．The United States. | D．France. |
A．a team at the Pasteur Institute in Paris succeeded in separating HIV
B．some effective medicine has been invented
B．scientists understand AIDS better and better.
D．The rate of HIV infections continue to rise in the United States
小题4:What"s the importance of the discovery of the source of AIDS?
A．It can be used to develop a test for AIDS.
B．It can stop HIV forming AIDS.
B．It can reduce the rate of death caused by AIDS.
D．It can help develop a drug to prevent AIDS.
. The depression is often associated with excessive eating or sleeping and weight gain. Women are twice to three times more likely to suffer from the winter blues than men. There are many effective treatments for winter depression, some of which you can do to help yourself. Increasing your daily exposure to as much natural light as possible can be helpful to many. Any time that you have the opportunity to gain access to more sunlight in the winter months, you should try to do so. Taking walks throughout the day (even if you don’t normally do so), sitting next to a south-facing window at your office, in a classroom, or at home will increase your sunlight exposure. Exercising next to a window or outdoors (when possible) is another activity that can help.
Although it may be difficult to do, maintaining your schedule and lifestyle will help to keep the depression at bay. A regular pattern of sleep is the most important thing to maintain. It may be helpful, for instance, to have your bedroom lights on a timer to turn on a half-hour before you wake. This may help in waking at a regular time every morning, when it is still dark outside in the winter months.
Light therapy has shown to be an effective treatment for seasonal affective disorder. While you can purchase expensive, specialized light therapy lighting fixtures for your home or office, some inexpensive alternatives are also available. Another lighting technique to try is to replace commonly used light bulbs in your home with brighter full spectrum (also known as broad spectrum) light bulbs. While more expensive than regular light bulbs, these bulbs provide light that is similar to natural sunlight.
If none of these techniques seem to help your depressive symptoms, you should consider consulting your family physician or a mental health professional. The winter blues are a form of depression and can be readily treated w
ith medications or psychotherapy when other self-help methods aren’t effective. Don’t be afraid to talk about this condition with a professional; it’s nothing to be ashamed or afraid of. With a little effort, the winter blues can be beaten小题1: What do we know about winter depression?
| A．It is very common where the weather is cold. |
| B．It may lead to weight gain. |
| C．It occurs when the temperatures drop. |
| D．It seldom affects men. |
| A．Exposure to natural light. |
| B．Sports in winter months. |
| C．Outdoor activities. |
| D．Sunlight through the window. |
| A．To shorten the duration of the depression. |
| B．To use light to resist the depression. |
| C．To keep the depression manageable and minimal. |
| D．To delay the occurrence of the depression. |
| A．is much more effective than other kinds of therapy |
| B．is so expensive that some may not be able to afford it |
| C．encourages people to do outdoor exercises |
| D．needs specialized bulbs to replace ordinary ones |
| A．self-help methods do not work 100% of the time |
| B．medications or psychotherapy is much more effective |
| C．mental health professionals don’t recommend self- help methods |
| D．most people prefer self-help methods to medications |
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