题目内容

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'.
64-67 ADBD
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。
练习册系列答案
相关题目
Do junk food ads make kids fat? Should they be banned? Based on the evidence, more and more experts say yes. The latest support comes from a group of New Zealand experts who say they've made a link between kids watching television and bad health.
Researchers from the University of Otago in Dunedin studied 1000 children from age 3 to 26．They found that those who watched television more than two hours a day had higher levels of obesity（肥胖）, blood cholesterol（胆固醇）and smoking — as well as lower levels of physical fitness — when they reached adulthood than kids who watched less than two hours a day.  
Why? Partly because while they are watching TV kids aren't getting out, exercising and playing with other kids, and burning off the calories. But more insidiously（不知不觉地）, while watching TV, they're being shown a lot of ads for drinks and foods of uncertain nutritional value, most of which are full of sugar and fat.
Across the globe, about 155 million kids are obese, according to the International Obesity Task Force. The dangerous thing is not just the well-being of these kids as they grow up, but hundreds of billions of dollars of health costs spent on adults with heart disease, diabetes（糖尿病）, and the disabilities these disease will cause.
In Australia, two thirds of children are overweight and one third are obese. Twenty years ago, only about ten per cent were obese. And Australia has the greatest amount of junk food ads per hour of television than any other country in the world, including the US and the UK. About 30 per cent of all ads in kids' viewing time are for food or drinks. Most of them are for junk food: burgers, chips, soft drinks and sweets —high in fat, salt or sugar.
Here in Australia, experts are also calling for a ban on TV advertising of junk food to kids. The Coalition on Food Advertising to Children （CFAC） wants to make changes to laws, hoping it can ban all food advertising on TV during the time of the day when children under 12 years old are watching. This includes early and afternoon time, and evening TV between 5 pm and 9 pm.
小题1:From the passage, we can infer that the underlined word “obsess” probably means ______.
A．very strongB．very weak
C．very confidentD．very fat
小题2:According to the passage, how many hours can kids watch TV a day if they want to be healthier in the future?
A．more than 120 minutes a dayB．less than 120 minutes a day
C．180 minutes or so a dayD．240 minutes or so a day
小题3:______ has the greatest amount of junk food ads per hour of TV?
A．AustraliaB．ChineseC．CanadaD．Germany
小题4:In the author’s opinion, the junk food ads on TV are bad for kids’ health because _______.
A．They are very expensive and harmfulB．They waste a lot of kids’ spare time
C．They persuade kids to eat junk foodD．They are more inviting and interesting


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

LONDON（Reuters）-Organic fruit, delivered right to the doorstep. That is what Gabriel Gold prefers, and he is willing to pay for it. If this is not possible, the 26-year-old computer technician will spend the extra money at the supermarket to buy organic food.
"Organic produce is always better," Gold said. "The food is free of pesticides（农药）, and you are generally supporting family farms instead of large farms. And more often than not it is locally（本地）grown and seasonal, so it is more tasty. "Gold is one of a growing number of shoppers buying into the organic trend, and supermarkets across Britain are counting on more like him as they grow their organic food business. But how many shoppers really know what they are getting, and why are they willing to pay a higher price for organic produce? Market research shows that Gold and others who buy organic food can generally give clear reasons for their preferences-but their knowledge of organic food is far from complete. For example, small amounts of pesticides can be used on organic products. And about three quarters of organic food in Britain is not local but imported（进口）to meet growing demand. "The demand for organic food is increasing by about one third every year, so it is a very fast-growing market," said Sue Flock, a specialist in this line of business.
60. More and more people in Britain are buying organic food because ____.
　　A. they are getting richer
　　B. they can get the food anywhere
　　C. they consider the food free of pollution
　　D. they like home-grown fruit
61.Which of the following statements is true to the facts about most organic produce sold in Britain？
　　A. It grows indoors all year round.
　　B. It is produced outside Britain.
　　C. It is grown on family farms.
　　D. It is produced on large farms.
62.What is the meaning of "the organic trend" as the words are used in the text？
　　A. growing interest in organic food
　　B. better quality of organic food
　　C. rising market for organic food
　　D. higher prices of organic food
63.What is the best title for this news story？
　　A. Organic food-healthy, or just for the wealthy？
　　B. The making of organic food in Britain
　　C. Organic food-to import or not？
D. Good qualities of organic food
Drunken driving sometimes called American's socially accepted form of murder has become a national epidemic（流行病）．Every hour of every day about three Americans on average are killed by drunken drivers, adding up to an incredible 250,000 over the past ten years．A drunken driver is usually referred to as one with 0．10-blood alcohol content or roughly three beers, glasses of wines or shots of whisky drunk within two hours．Heavy drinking used to be an acceptable part of the American manly image and judges were lenient in most courts, but the drunken killing has recently caused so many well-publicized tragedies, especially concerning young children, that public opinion is no longer tolerant．
Twenty states have raised the legal drinking age to 21, reversing a trend （逆转潮流） in the 1960s to reduce it to 18．After New Jersey lowered it to 18, the number of people killed by 18-20-year-old drivers more than doubled, so the state recently upped it back to 21．
Reformers, however, fear raising the drinking age will have little effect unless accompanied by educational programs to help young people to develop "responsible attitudes" about drinking and teach them to resist peer pressure to drink．
Some states are punishing bars for serving customers too many drinks．A bar in Massachusetts was fined for serving six or more double brandies to a customer who was "obviously drunk" and later drove off the land, killing a nine-year-old boy．
As the accidents continue to occur daily in every state, some Americans are even beginning to speak well of the 13 years national prohibition （禁令） of alcohol that began in 1919, which President Hoover called the "noble experiment"．They forget that legal prohibition didn't stop drinking, but encouraged political corruption （腐败） and organized crime．As with the booming drug trade generally, there is no easy solution．
小题1:It can be inferred from the passage that drunken driving has become a major problem in the United States because___．
A．most Americans like drinking
B．heavy dinking is hard to avoid
C．Americans are not shocked by traffic accidents
D．many Americans are killed by traffic accidents
小题2:What can be inferred from the fact of the traffic accidents in New Jersey?
A．Drivers should not be allowed to drink．
B．Young drivers were usually bad．
C．The legal drinking age should be raised．
D．Some drivers didn't reach the legal drinking age．
小题3:The underlined word "lenient" in the first paragraph means___．
A．cruelB．seriousC．determinedD．merciful§
小题4:Which of the following best shows the writer's opinion of drunken driving?
A．It may cause organized crime．
B．The new laws can stop heavy drinking．
C．There should be no bars to serve drinks．
D．It is difficult to solve the problem．
Brian Walker chews pens. He bites them so hard that his boss has warned him to stop or buy his own. Kate’s weakness is more acceptable-she is unable to walk past a cake shop without overeating Sophin Cartier finds her cigarette habit a headache, while Alice’s thumb-sucking drives her boy friend crazy. Four people with very different habits, but they all share a common problem anxiety disorder or, in serious cases. Obsessive Compulsive Disorder  (OCD).
From nail-biting to too much hand-washing, overeating and internet addiction（上瘾）,OCD is widespread in almost every workplace and countless home. “It is a relatively common form of anxiety,” says Dr. Mootee. “The main feature of OCD is the repetition of unwanted obsessive（过度的） thoughts such as worries that doors are left unlocked , gas or electrical appliances are left on.” In order to fight against the an esasy checking door locks and gas or electrical appliances.
Dr. Mootee says that repetitive washing, particularly of the hands, is the most common type of OCD. She has treated many patients who wash their hands up to 30 times a day. The technique Mootee uses to treat people with OCD is called cognitive-behavioral therapy（认知行为疗法）.“It is based on the general idea that people have the ability to change the way they think and behave,” says Mootee.
But when does a habit become a problem? “It’s personal,” says Mootee.“Everyone has something unusual, but if you can’t put up with it, then it’s a problem and you need to do something to change it.”Mootee says many people resist for treatment because they fear they are “crazy”. But as people become more knowledgeable about these problems they will go and get help. The only way to cure is to conquer
小题1:If a person suffers from OCD, be is likely to keep doing any of the following EXCEPT   .
A．chewing pensB．hurting himself
C．sucking fingersD．biting nails
小题2:According to the passage, a person suffering from OCD    .
A．reduces his/her anxiety by taking drugs
B．gets into unwanted habits to relieve stress
C．has unwanted thoughts about habits
D．has unwanted thoughts because of illness
小题3:Dr. Mootee’s treating lechnique is based ont eh idea that    .
A．everyone has something different
B．people can put up with their problems
C．people can change their way of thinking and action
D．people tend to repeat their obsessive actions
小题4:By saying “The only way to cure is to conquer.” Dr. Mootee suggests that an OCD sufferer   .
A．has to be an extraordinary person
B．must cure his illness by himself
C．must overcome many physical illnesses
D．should have a right attitude towards the problem

It’s not always easy to eat healthy foods when others seem to eat whatever they want. Follow the tips and know that it will make a difference in your life.
What about sweet foods?
Everyone likes the taste of sweet foods! Small amounts of sweet foods can be part of a healthy meal plan. Sugary foods include soda, sweetened fruit drinks, honey, and candy. Desserts such as cakes, pies, cookies, and ice cream contain a lot of fat as well as sugar. If you choose to eat any of these sweet foods, just have a small amount at the end of a healthy meal. Have a piece of fruit if you are still hungry. Drink water, sugar-free soda, and sugar-free fruit drinks, if you are thirsty, instead of drinks that are all high in sugars.
How much should you eat?
Your height, weight, age, whether you are a boy or a girl, and how active you are will affect how much food you need to eat each day to stay at a healthy weight. Everyone is different. Talk to your doctor or diet expert about how much to eat, especially if you need to lose weight. If you take in more food than your body burns, you will gain weight. If you take in less food than your body burns, you will lose weight. Being active and eating smaller amounts of food and fewer sweet or fatty foods can help overweight kids lose weight in a healthy way. You will keep your heart healthy, too.
67.Which of the following desserts is NOT mentioned in the passage?
A.Cakes.                     B.Pies.                        C.Cheese.                           D.Cookies.
68.How much we should eat will depend on the following EXCEPT___________.
A.our body size                      
B.the time we spend taking exercise
C.how old we are             
D.the money our family earns
69.According to the passage, which of the following statements is TRUE?
A.The more food our body burns, the faster we will lose weight.
B.The more food we eat, the more food our body will burn.
C.The more active we are, the more food we need to eat.
D.The more food we eat, the more weight we will gain
70.The author advises overweight children to_________.
A.eat healthy foods and take regular exercise
B.pay much attention to their heart health
C.keep foods containing sugar and fat away
D.talk to their doctor and join a health club
Peanut allergies (过敏) are among the most common and most dangerous of food allergies. A tiny exposure to peanuts can mean big trouble for a person with a peanut allergy—not just sneezing or coughing，but something as potentially deadly as narrowing of the airways.
But a recent study suggests that some children may be able to beat back their allergic reactions to peanuts by gradually introducing trace amounts of the nut into their diets. It's too early to say for certain，so if you have a peanut allergy，do not try this at home. But the first results look promising.
Two teams of scientists have been experimenting on a group“of 29 children who are allergic to peanuts”At the beginning of the study，each kid received less than 1/1，000 of a peanut per day. (Imagine splitting a peanut into 1，000 parts!) Over the course of the study， the children gradually increased the amount of the peanut in their diets
Nine of the children have been receiving the treatment for two years，and five of those nine now appear to be free of their peanut allergies，and can eat peanuts with no problem. But the other four have not benefited so much from the therapy（治疗）.
The two teams of scientists are now doing a follow-up study on two groups of children with the allergy. Children in one group will receive the new therapy，while the others will not. Researchers hope this study will help them learn if the therapy truly does work.
Scientists don't understand why some people get peanut allergies and others don't，but are trying to find a way to help people with the allergy. Because of the severity of some peanut allergies，scientists want to know the answer as soon as possible. “This is very encouraging， but remember，it's not something you try at home，”says one of the researchers.
68.According to the passage，the peanut allergy     .
A. can be deadly if only a small amount is used
B. causes a lot of trouble for many parents
C. allows people to eat only small amounts of peanuts
D. is considered the least common and dangerous food allergy
69.Scientists are trying to treat peanut allergies by     .
A. exposing children with the allergy to as many peanuts as possible
B. changing the eating habits of children with peanut allergies gradually
C. giving children Peanuts in slowly increasing amounts
D. exploring ways to resist the feelings caused by peanut allergies
70.The experiment shows that     . 
A. people with peanut allergies can't use small amounts of peanuts in their diets.
B. children are more easily cured than adults
C. all children can be cured of their peanut allergies if given more time of treatment
D. about 55-percent children with peanut allergies have been cured
71. Scientists are now doing a follow-up study in order to     .
A. explore why some people get the illness while others don’t
B. show whether peanut allergies can really be dangerous
C. check whether the therapy really works or not
D. explore whether the allergy can be cured without treatment
If you know exactly what you want, the best way to get a job is to get specialized training. A recent report shows that companies like graduates in such fields as business and health care who can go to work immediately with very little on-the-job training.
That’s especially true of booming fields that are challenging for workers. At Cornell's School of Hotel Administration, for example, bachelor's degree graduates get an average of four or five job offers with salaries ranging from the high teens to the low 20s and plenty of chances for rapid advancement. Large companies especially like a background of formal education coupled with work experience. But in the long run, too much specialization does not pay off. Business, which has been flooded with MBAs, no longer considers the degree an automatic stamp of approval. The MBA may open doors and command a higher salary initially, but the impact of a degree washes out after five years.
As further evidence of the erosion of corporate faith in specialized degrees, Michigan State’s Scheetz cites a pattern in corporate hiring practices. Although companies tend to take on specialists as new hires, they often seek out generalists for middle and upper-level management. This sounds like a formal statement that you approve of the liberal-arts(文科) graduate. Time and again labor-market analysts mention a need for talents that liberal-arts majors are assumed to have: writing and communication skills, organizational skills, open-mindedness and adaptability, and the ability to analyze and solve problems. David Birch, manager of the Boston Red Sox, says that he does not hire anybody with an MBA or an engineering degree. “I hire only liberal-arts people because they have a less-than-canned way of doing things,” says Birch.
For a liberal – arts degree, students focus on some basic courses that include literature history, mathematics, economics, science, human behavior and a computer course or two. With these useful and important courses, you can feel free to specialize, “A liberal-arts degree coupled with an MBA or some other technical training is a very good combination in the marketplace,” says Scheetz.
67．The job market is in great need of people with          .
A．special training in special fields
B．a bachelor’s degree in education
C．formal schooling and work experience
D．an MBA degree from top universities
68．The underlined sentence in Paragrph 2 means         .
A．an MBA degree does not help in future promotion
B．MBA programs will not be as popular as they are now
C．people will not forget the degree the MBA graduates have got
D．most MBA programs fail to provide students with a foundation
69．David Birch says that he only hires liberal – arts people because          .
A．they will follow others’ ways of solving problems
B．they can do better in bundling changing situations
C．they are well trained in a variety of specialized fields
D．they have attended special programs in management
70．The author supports the idea that          .
A．on – the – job training is less costly in the long run
B．formal schooling is less important than job training
C．specialists are more expensive to hire than generalists
D．generalists will do better than specialists in management

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网