A healthy dose of sunshine may be the secret to staying young, British scientist

题型：不详难度：来源：

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.
Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.
Researchers from King"s College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.
The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.
Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．
"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."
He said further studies are required to confirm the findings.
Professor Tim Spector, head of KCL"s twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it"s possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."
Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body"s supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
64．What’s the best title of this passage?
A．Sunshine "helps to keep you young"
B．Vitamin D has a protective effect on many diseases
C．Telomeres - a biological marker of ageing
D．People have found the secret to having a long life
65．How can people get vitamin D?
A．through water B．through sunshine
C．through food D．both B and C
66．What does the underlined word in paragraph three refer to?
A．It refers to a kind of vitamin that can keep you young.
B．It refers to a biological marker of ageing found in DNA.
C．It refers to a kind of element that can be obtained from sunshine.
D．It refers to a part of the body.
67．Which of the following is not true according to the passage?
A．women with high levels of vitamin D shows a sign of being biologically younger and healthier.
B．vitamin D has a protective effect on many ageing related diseases.
C．too much sunshine may increase our risk of skin cancer.
D．It has been proved that sunshine "helps to keep you young".

答案

64-67 ADBD

解析

英国科学家日前公布，长期坚持晒太阳可能是永葆青春的秘诀。
64．主旨大意题。根据文章第一段主题段可以看出，长期坚持晒太阳可能是你永葆青春的秘诀。
65．细节理解题。根据倒数第二段Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body"s supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.可以看出，维生素D主要通过日晒获得，也可通过食物获得。
66．词意理解题。根据第三段第二行：looking at their telomeres - a biological marker of ageing found in DNA.可以看出，telomeres，是位于染色体末端的DNA微粒。
67．细节判断题。根据倒数第四段He said further studies are required to confirm the findings.可以看出，还需要进一步的研究证实这项发现。

举一反三

No matter how long your life, you will, at best, be able to read only a few books of all that have been written, and the few you do read should include the best. You can rejoice in the fact that the number of such is relatively small.
________________ Yet there is a surprising uniformity in the lists which represent the best choices of any period. In every age, the list makers include both ancient and modern books in their selections, and they always wonder whether the moderns are up to the great books of the past.
What are the signs by which we may recognize a great book? The four I will mention may not be all they are, but they are the ones I’ve found most useful in explaining my choices over the years.
Great books are probably the most widely read. They are not best sellers for a year or two. They are enduring best sellers. GONE WITH THE WIND has had relatively few readers compared to the plays of Shakespeare or DON QUIXOTE. It would be reasonable to estimate that Homer’s Iliad（伊丽亚特）has been read by at least 25,000,000 people in the last 3000 years.
Great books are popular, not pedantic. They are not written by specialists about specialties for specialists. Whether they are philosophy or science, or history or poetry, they treat of human, not academic problems. They are written for men, not professors. To read a textbook for advanced students, you have to read an elementary textbook first. But the great books can be considered elementary in the sense that they treat the elements of any subject matter. They are not related to one another as a series of textbooks, graded in difficulty or in the technicality of the problems with which they deal.
Great books are always contemporary, the most readable and instructive.
Great books deal with the persistently unsolved problems of human life. There are genuine mysteries in the world that mark the limits of human knowing and thinking. Inquiry not only begins with wonder, but usually ends with it also. Great minds acknowledge mysteries honestly. Wisdom is fortified, not destroyed, by understanding its limitations.
64．Which of the following can be put in the blank in the second paragraph?
A．Great books deal with the persistently unsolved problems of human life.
B．It is to be expected that the selections will change with the times
C．The listing of the best books is as old as reading and writing.
D．The fundamental human problems remain the same in all ages.
65．According to the author, Gone With The Wind is ________.
A．a best seller
B．disgusted by readers who like Shakespeare
C．read more often than Don Quixote
D．a great book
66．In the passage “pedantic” means ________.
A．showing the feelings, esp, those of kindness, which people are supposed to have
B．serving as practical examples
C．being elementary
D．paying too much attention to details in books
67．The best title for this passage is ________.
A．Great Books in Your Life       B．Great Books in Your Speciality
C．How to Find a Great Book?    D．What Is a Great Book?

题型：不详难度：| 查看答案

lt, they do not only look younger and slimmer, but feel better. Because of increased physical fitness, life expectance in the nation has risen to seventy-three years, with fewer people suffering from heart disease, the nation"s number one killer.
Jogging ( 慢跑 ), the easiest and cheapest way of improving the body, keeps over 30million people of all ages on the run. For the price of a good pair of running shoes, anyone anywhere can join the race.
Dieting, too, has become a national pastime. Promoters of diets that eliminate eating one thing or another, such as fats or carbohydrates ( 碳水化合物 ), promise as much as 20- pound weight losses within two weeks. Books describing such amazing diets always head up ( 居……之首 )the best-seller lists because people who are overweight want to lose weight quickly and easily.
Nevertheless, jogging and dieting, carried to extremes, can be harmful. Many confused joggers overdo and finally suffer from ankle and foot damage. Dieting, fortunately, becomes only a temporary means for shedding a few pounds while the body lose the balanced nutrition ( 营养 )it requires, so most dieters cannot keep on diets. Above all, common sense should be the keystone for any dieting and exercise plan.
6.The main idea of this passage is that___________ .
A. both jogging and dieting can improve your health
B. exercise and improved diet has raised the American"s life expectance
C. people, who jog and diet wisely, will be healthier than those who do not
D. diet and exercise harm rather than benefit health
7.According to the passage, which of the following statements is TRUE?
A. Jogging can damage the body because it is too tough an exercise.
B. Diets are so popular because they are on the best-seller lists.
C. Americans now live to be 73years old.
D. Exercise and diet are more widespread in America than ever before.
8.It is implied but not stated that ___________ .
A. heart disease is the number one killer among Americans
B. exercise and dieting bring about spiritual as well as physical well-being
C. people don"t stay on a diet because it doesn"t work
D. a 20-pound weight loss within two weeks is too much for the body
9. The best title for this passage is ___________ .
A. Jogging and Diet      B .Exercise and Health
C. Physical Fitness     D. Life Expectancy and Diet

题型：不详难度：| 查看答案

Most of us lead unhealthy lives; we spend far too much sitting down. If in addition we are careless about our diets, our bodies soon become loose and fatty and our systems slowmoving. There are some aspects(方面) of our unhealthy lives that we cannot avoid. I am thinking of such features of modern city life as pollution, noise, rushed meals and stress. But keeping fit is a way to reduce the effects of these evils. The usual suggestion to a person who is looking for a way to keep fit is to take up some sport or other. While it is true that every weekend you will find people playing football and hockey in the local park, they are outnumbered a hundred to one by the people who are simply watching them.
　　For those who do not particularly enjoy competitive sports — and it is especially difficult to do so if you are not good at them — there are such separate activities as cycling, walking, jogging and swimming. What often happens though is that you do them in such a leisurely way, so slowly, that it is doubtful if you are doing yourself much good, except for the fact that you have at least managed to get up out of your armchair.
　　Even after you have found a way for keeping in shape, through sport or gymnastics, you are still only half way to good health, because, according to the experts, you must also master the art of complete mental and physical relaxation(放松). It has to do with deep breathing, emptying your mind of all thoughts, meditation, and so on. Yoga, as practiced in the West, is the most widely known and popular of the systems for achieving the necessary state of relaxation. It seems ironical (讽刺性的), though, that as our lives have improved in a material sense we have found it increasingly necessary to go back to forms of activityphysical effort on the one hand and relaxation on the other — which were the natural way of life of our forefathers.
12. Pollution, noise and stress are examples of _____.
A. causes of unfitness
B. bad features of living in towns
C. the things we can completely do away with
D. unavoidable things in town
13. We don’t get much out of separate sports because we _____.
A. don’t do them very often
B. don’t do them actively enough
C. find it hard to get out of our armchairs
D. don’t find them interesting
14. To be healthy we must _____.
A. keep fit and active B. keep fit and learn to relax
C. be active and practise Yoga D. have a sound mind
15. Our forefathers were healthy because______.
A. their way of life closely connected with both exercise and relaxation
B. they were careful to get plenty of fresh air
C. they spent most of the time out of doors
D. their environment was not polluted

题型：不详难度：| 查看答案

Bicycles are a great way to get around. They’re fun to ride, especially down hills. And, as you speed along the road, you might also think of ways in which you could improve your bike— make it safer, more efficient, or more comfortable. In fact, the two-wheeled machines make for some cool science projects.
This year"s Intel International Science and Engineering Fair (ISEF), held last May in Cleveland, featured（had）three bicycle projects from three countries. Like many of the other experiments presented at ISEF, the bike projects showed that some of the most interesting scientific research often begins by taking a closer look at things you care about.
Renato Angulo Chu had even grander ambitions. The 12th-grader from Lima, Peru, wanted to address some of his country"s economic troubles.
"I see a problem in my country," Renato said. "If you go to the forests in Peru, in some places you cannot find electricity. If you go with my bicycle, you can turn on the lights."
Renato, 16, spent 3 years designing his special Multibike. The device looks like a fixed exercise bike. It has wires fixed along the frame and a blender strapped(fastened) to the back. Turning the pedals operates the blender. The same principle can be used to sharpen knives or sweep city streets.
The Multibike can work either as a fixed bike or as a bicycle able to travel city streets and country roads. It"s made from inexpensive materials, and the user gets exercise while pedaling to operate a machine.
"You pedal the bike, and you can mix any drink you want," Renato said. More importantly, he added, the same concept could be used to bring light to houses in remote regions of the rainforest.
19. What can we learn from the first paragraph?
A. Bicycles are the best way to go about
B. Bikes should be made more comfortable to ride.
C. You can improve your bicycle for science research.
D. Many inventions are connected with the bicycle.
20. Which of the following is true according to the passage?
A. ISEF is an exhibiton displaying bicycle experiments designed by students.
B. Looking closely at things you are concerned about can lead to scientific research.
C. Renato’s improvement of the bicycle has solved the country’s great problem.
D. Renato’s special bicycle will soon be put into use in remote areas.’
21. The underlined word “address” in the third paragraph probably has the same meaning as _______.
A. make address written        B. give up             C. work at             D. speak at
22. Renato’s special Multibike has all the following EXCEPT ________.
A. making knives sharp                                     B. mixing any kind of drinks
C. producing electricity                                     D. operating a machine with its own electricity
23. It can be inferred that Renato’s special bicycle is mainly designed for ________.
A. distant areas in the rainforest without electricity.
B. the use of his own family to make life easier.
C. the competition of ISEF to win money to support remote rainforests
D. enough exercise by pedaling it

题型：不详难度：| 查看答案

　　If you do not use your arms or your legs for some time, they become weak. When you 1using them again, they 2become strong again. Everybody knows this and nobody would think of 3 this fact. 4 there are many people who do not 5 to know that memory works in the 6 way.
　　7someone says that he has a good memory; he8 means that he 9 his memory by practising exercising it. When someone 10 says that his memory is poor, he actually means that he 11 give it enough chances to become 12 .Have you ever 13 that people who cannot read or write usually have 14 memories than those who can? This is 15 those who 16 read or write 17 remember things. They have to remember dates, places, names, songs and stories. So their memory is the whole time 18 .So 19 you want to have a good memory, you should learn from those people, 20 by remembering what you see, hear, feel and write. If so, you must have a good memory.
　　1. A. begin       B. go on     C. stop        D. continue
　　2. A. quickly     B. slowly     C. soon       D. at once
　　3. A. doing      B. agreeing    C. questioning D. answering
　　4. A. Yet        B. Still       C. So         D. Certainly
　　5. A. want       B. seem      C. get         D. hope
　　6. A. other       B. usual      C. same        D. opposite
　　7. A. As         B. What      C. While       D. When
　　8. A. real        B. actually    C. true        D. then
　　9. A. wants      B. builds up    C. makes      D. keeps
　　10.A.again      B. else         C. more       D. once
　　11.A.do not     B. is not        C. never       D. does not
　　12.A.poor       B. weak        C. strong      D. healthy
　　13.A.seen       B. heard of      C. noticed     D. thought of
　　14.A.worse      B. better       C. more        D. less
　　15.A.why        B. how       C. because      D. the reason
　　16.A.used to     B. cannot      C. try to        D. have to
　　17.A.will not     B. have to      C. refuse      D. cannot
　　18.A.ready       B. being used   C. busy       D. training
　　19.A.if          B. that        C. though      D. thus
20.A.please      B. try          C. train       D. enjoy

题型：不详难度：| 查看答案