Cancer researchers urged people on Wednesday to take more vitamin D to lower risk of cancer, saying studies showed a clear link. “Our suggestion is for people to increase their intake (吸入，攝入), through diet or a vitamin supplement,” Dr. Cedric Garland said in a telephone interview.
Garland's research team reviewed 63 studies, including several large long-term ones, on the relationship between vitamin D and certain types of cancer worldwide between 1966 and 2004. “There's nothing that has this ability to prevent cancer,” he said, urging governments and public health officials to do more to fortify (增強(qiáng)) foods with vitamin D. Garland is part of a University of California at San Diego Moores Cancer Center team that published its findings this week online in the American Journal of Public Health. Vitamin D is found in milk, as well as in some fortified orange juice, yogurt and cheeses, usually at around 100 international units（IU）a serving. “People might want to consider a vitamin supplement to raise their intake to 1000 IUs per day” Garland said， adding that it was well within the safety guidelines established by the National Academy of Sciences.
The authors said that taking more vitamin D could be especially important for people living in northern areas, which receive less vitamin D from sunshine.
“African Americans, who don't produce as much of the vitamin because of their skin colour, could also benefit significantly from a higher intake,” the authors said.
61. According to the passage, people are advised to take more Vitamin D, because__.
A. it is nutritious             B. it can‘t harm people’s health
C. it can lower cancer risk      D. it is not taken enough every day
62. Which of the following can not help people get more Vitamin D?
A. Have some sunshine        B. Have more meat
C. Have more fortified cheese   D. Have a vitamin supplement
63.Who can Garland probably be?
A. A health researcher        B. A doctor   
C. A scientist               D. A public health official
64.Which of the following food can lower people‘s chance of getting cancer?
A. Milk                    B. Fortified orange juice
C. Fortified yogurt           D. All of the above
65.People from which area should take more Vitamin D according to the passage?
A. Asian people               B. African people 
C. American people            D. European people
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空


　　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

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Most young people enjoy some form of physical activity. It may be walking, cycling or swimming, winter skating or skiing in winter. It may be a game of some kind, football, hockey, golf or tennis. It may be mountaineering（爬山）.
Those who have a passion（熱情）for climbing high and difficult mountains are often looked upon with astonishment. Why are men and women willing to suffer cold and hardship, and to take risks on high mountains? This astonishment is caused probably by the difference between mountaineering and other forms of activity to which men give their leisure.
Mountaineering is a sport and not a game. There are no man-made rules, as there are for such games as golf and football. There are, of course, rules of a different thing that it would be dangerous to ignore（忽視），but it is this freedom from man-made rules that makes mountaineering attractive to many people. Those who climb mountains are free to use their own methods.
If we compare mountaineering and other more familiar sports, we might think that one big difference is that mountaineering is not a “team game”. We should be mistaken in this. There are, it is true, no“matches”between“teams”of climbers, but when climbers are on a rock face linked by a rope on which their lives may depend, there is obviously teamwork.
The mountain climber knows that he may have to fight forces that are stronger and more powerful than men. He has to fight the forces of nature. His sport requires high mental and physical qualities
A mountain climber continues to improve in skill year after year. A skier is probably past his best by the age of thirty, and most international tennis champions are in their early twenties. But it is not unusual for a man of fifty or sixty to climb the highest mountains in the Alps. They may take more time than younger men, but they probably climb with more skill and less waste of efforts and they certainly experience equal enjoyment.
小題1:Mountaineering involves      .
A．coldB．hardshipC．physical riskD．a(chǎn)ll of the above
小題2:The difference between a sport and a game has something to do with the kind of        .
A．a(chǎn)ctivityB．rulesC．uniformD．participants
小題3:Mountaineering can be called a team sport because      .
A．it is an Olympic event
B．teams compete against each other
C．mountaineers depend on each other while climbing
D．there are 5 climbers on each team.
小題4:Which is the best title for the passage?
A．Mountaineering Is Different from Golf and Football k
B．Mountaineering Is More Attractive than Other Sports
C．Mountaineering
D．Mountain Climbers

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


第三部分閱讀理解（共20小題；每小題2分，滿分40分）
Burns can be caused by fire, the sun, chemicals, heated objects or fluids, and electricity. They can be minor problems or life-threatening emergencies. Distinguishing a minor burn from a more serious burn involves determining the degree of damage to the tissues of the body. If you are not sure how serious the burn is, seek emergency medical help.
First-degree burns are those in which only the outer layer of skin is burned. The skin is usually red and some swelling (腫大) and pain may occur. Unless the burn involves large portions of the body, it can be treated at home.
Second-degree burns are those in which the first layer of skin has been burned through and the second layer of skin is also burned. In these burns, the skin reddens intensely and blisters (水泡) develop. Severe pain and swelling also occur. Second-degree burns require medical treatment.
Third-degree burns are the most serious and involve all layers of skin. Fat, nerves, muscles, and even bones may be affected. Areas may be charred black or appear a dry white. If nerve damage is substantial, there may be no pain at all. These burns require emergency medical attention.
Follow these steps when treating minor burns at home:
1) If the skin is not broken, run cool water over the burn for several minutes.
2) Cover the burn with a sterile (消過(guò)毒的) bandage or clean cloth.
3) Take aspirin to relieve any swelling or pain.
Seek emergency treatment immediately for major burns. Before an emergency unit arrives, follow these steps:
1) Remove the person from the source of the burn (fire, electrical current, etc.).
2) If the person is not breathing, begin mouth-to-mouth resuscitation (人工呼吸) immediately.
3) Remove all clothing to stop further burning. If the clothing is stuck to the burn, do not attempt to remove it.
4) Cover the burned area with a cool, moist, sterile bandage or clean cloth. Do not place any creams, ointments (藥膏) or ice on the burned area or break blisters.
5) Monitor the patient for signs of shock, and treat accordingly.
1. The underlined sentence in the first paragraph probably means “______”.
A. They can be dangerous if you don’t treat them seriously
Ｂ. They range from slight burns to deadly ones
C. They seldom cause deaths even if not treated properly
D. They usually cause deaths if not treated properly
2. Burns are divided into different degrees according to _______.
A. what kind of treatment they need
B. what kind of tissue of the body is damaged
C. whether there is pain and what degree of pain there is
D. which layer of skin is burned
3. From the passage we learn that _______.
A. if there is severe pain, then you need medical treatment
B. first-degree burns don’t require medical treatment
C. burns without pains can be treated at home
D. the larger the swelling is, the more serious it is
4. It can be inferred from the passage that ______.
A. you shouldn’t cover the burn with a bandage or cloth if it is severe
B. you shouldn’t move the person unless you know how to do first aid
C. you shouldn’t run cool water over the burn if the skin is broken
D. you shouldn’t place any wet towels on the burned area
5.where do you probably find the passage?
A.a fashion magazine     B.a guide book
C.a book on first aid      D.a section about culture in the newspaper

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


C
We have developed a new range of first aid courses designed to meet the needs of home or leisure activities. It will help you in the everyday life.
Emergency life support
Our emergency life support course takes just three hours to complete and will give you the essential skills to save a life. It includes heart attacks, stroke, stomachache and serious bleeding.
Basic first aid
This course is about everyday first aid: cuts and scrapes, minor burns and scalds.
Family first aid
This course is for families to learn first aid together. The course covers the same content as Basic first aid and Emergency life support. The course takes six hours.
Activity first aid
This course takes 16 hours and includes all the content of Emergency life support, Basic first aid and Family first aid course. It also covers conditions caused by the extremes of temperature, low blood sugar and casualty management.
Total first aid
It is our most comprehensive first aid course taking 28 hours to complete. This course is for members of the public who want an in－depth knowledge of first aid techniques. This includes all of the content of the Activity first aid course and training in using some medical instruments.
Emergency aid for traffic
This course is specifically designed for accidents and covers emergency life support skills and head injuries.
Sports first aid
This course will give you all the necessary first aid skills to deal with a whole range of sporting injuries.
64．These first aid training courses are mainly designed for______.
A．housewives                                                                B．members of the public
C．doctors and nurses                                                  D．school students
65．The underlined word "scrapes" probably means"______".
A．injuries caused by a serious accident                  B．sudden attack on the brain
C．injuries caused by something rough                    D．injuries caused by animals
66．How long does it take to complete the Basic first aid course?
A．Three hours.               B．Four hours.                  C．Five hours.                   D．Six hours.
67．Which of the following contains most first aid skills?
A．Basic first aid.   B．Family first aid.        C．Activity first aid.         D．Total first aid.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

 Eat healthier. Exercise twice a week. Read more books. Lose weight. We make the same resolutions(決心) every year, but most of us fail, dying out after only a few days or , at best, weeks. Even the most successful among us crash and burn when it comes to personal change. President-elect Barack Obama struggles to remove his cigarette habit.
Professionals who help people make changes in their lives suggest the change is determined not by one's surroundings, but one's mind. Beginning with small goals or steps usually leads to a bigger payoff later, they say. But they caution that the experience is different for everyone.
"People are more likely to make positive changes in their lives not only when their friends do, but when their friends of friends do, and when their friends of friends of friends do," said Nicholas Christakis, a professor of medical sociology at Harvard University. "People are better able to make changes in their lives - lose weight, quit smoking, become happy - when they do this with a large number of other people, and so taking advantage of your social network ties can result in a magnification of your own efforts."
Jhonny Augustin understands that well. His resolution for 2008 was to shed 30 pounds from his 237-pound frame. But the change didn't come easily. He said,"I'm a huge procrastinator, I kept putting it off until tomorrow. I didn't get to do it until the summer." However , Augustin got inspired when he saw his older brother working out. Today, Augustin weighs 190 pounds.
“Of course, change can happen only if people don't set their expectations too high or try to tackle too many changes at once; one of the biggest mistakes we make is setting unrealistic goals, ”said Dalia Llera, a psychologist and associate professor of counseling and psychology at Lesley University. "You can't accomplish in a few weeks what you haven't accomplished in a few years," said Llera.
46.From the first paragraph we can infer that      .
A.change for a person is challenging
B.famous people have great determination
C.most people don’t want to change themselves
D.personal change is beyond belief
47.It is known from Nicholas christkis that      .
A. making a change is easier with support from a cheerful group of friends
B. social networks have great effect on one’s change
C. people who have the same attitude often get together
D. people’s mood can contribute to their efforts
48.The word “procrastinator” in Paragraph 4 refers to those who      .
A. have great determination to make a change
B. have no desire to do something great
C. put off work especially because of laziness
D. have habitual carelessness and laziness
49.According to the passage, Dalia Liera suggested that      .
A. people should understand their goals well
B. people should try their best to change themselves
C. people should have confidence and positive habits
D. people should start with setting small goals to meet
50.The passage is mainly about      .
A. the reason why losing weight is so hard
B. the effect of the positive change
C. the attitudes towards change in life
D. the ways of making a change

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


D
To what degree can a computer achieve intelligence (智力)? The answer to this question may lie in a newly-developed US computer program called Smarter Child and the Internet．
If you ran into Smarter Child online , you would be surprised at this kid’s huge memory．It can recite many facts． For example , Smarter Child knows every baseball player in every team this season．
He knows every word in the dictionary and the weather in every major city areas across the US．However , if you ask Smarter Child other questions , you get stranger answers．A question about Smarter Child’s age returns． “One year, 11 days, 16 hours, 7 minutes, and 47 seconds!” Asking where he lives gets , “In a clean room in a high-tech building in California．”
Smarter Child uses the vast information on the World Wide Web as his memory bank．To answer questions about spelling , for instance , Smarter Child goes to American Heritage Dictionary online．For the weather , he visits www．intellicast．com．
Some scientists believe that by joining the many systems of the Internet , an artificial being with the combined knowledge of , say , Albert Einstein, Richard Nixon and Britney Spears could be born．However if Smarter Child wants to think and learn on his own like the boy-computer David in the movie A．I．, Artificial Intelligence , he must overcome two problems．
The first is that computers find it difficult to read web pages because the files are labeled in different ways．That’s why programmers need to tell Smarter Child where to look for the weather．It would be a much more difficult task to let him find it himself．
Another problem is that while Smarter Child can process (處理) information more exactly and faster than any human , he lacks common sense—a basic grounding of knowledge that is obvious to any young child．
67．From the text we can infer that www．intellicast．com is a website___________．
A．which is specially designed to help Smarter Child
B．where we people can find Smarter Child
C．where weather forecasts are made
D．which is about artificial intelligence
68．It is probably most difficult for Smarter Child to_______．
A．tell us how to spell a difficult word
B．tell us how the American government is run
C．provide us with a famous poem by Shakespeare
D．learn how to tell right behaviors from wrong ones。
69．Which of the following is TRUE according to the text?
A．Smart Child has his own memory bank big enough for all kinds of information．
B．A．I．Artificial Intelligence is probably the name of a film about a boy-computer．
C．Smart Child can recognize different files and find information needed on his own．
D．We have similar product now which has the knowledge of Einstein , Nixon and Spears．
70．Which of the following is the best title for the passage?
A．A New Web Child      B．Smarter Child
C．The Future of Internet    D．Intelligence Development

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

When people lose legs after accidents or illnesses, emergency care and artificial limbs（假肢）often allow them to walk again. Newts （蠑螈） in the same situation, on the other hand, can grow limbs back on their own! Scientists have known for a long time that certain animals can re-grow limbs, but they haven’t quite figured out how these creatures do it.
Researchers have now come up with some new ideas. Their work may give people the ability to re-grow lost limbs. The researchers started with two simple experiments：when you cut a newt’s leg at the ankle, only the foot grows back；when you cut off a leg at the very end, the whole leg grows back. In both cases, the re-growth begins with stem cells. Stem cells can develop into nearly any type of cell in the body.
How do a newt’s stem cells know when to grow only a foot and when to re-grow a whole leg?
This question relates to another mystery. In newt’s, a cut-off leg will grow back only if the nerve bundle（神經(jīng)束）in it also grows back , but if something prevents the nerve bundle from growing, the stem cells at the wound won’t re-grow a new leg.
In its study, a British team focused on a protein called n-AG. When the team prevented nerves in a limb from growing, but added the n-AG protein to stem cells in the limb, the limb still re-grew. That protein seems to guide limb re-growth. People have proteins that are similar to n-AG. Further research into these materials may someday help human limbs recover by themselves.
40. In the experiments, the researchers cut off a newt’s foot or leg to find out _____.
A. what stem cells were                    B. whether they would grow back
C. how long it would take to re-grow    D. how they would re-grow
41. A newt will re-grow its leg if _____.
A. its ankle was cut off but the nerve bundle was good
B. its leg was cut off and the nerve bundle stopped growing
C. its leg was cut off and the nerve bundle could grow back
D. its ankle and the nerve bundle were cut off
42. What do the underlined words “these materials” refer to?
A. Nerve bundles and proteins.         B. Proteins similar to n-AG.
C. Stem cells and proteins.              D. Stem cells and nerve bundles.
43. The first sentence of the passage _____.
A. acts as a lead–in                      B. shows where researchers got their new ideas
C. states the author’s opinion           D. describes the result of researchers’ studies

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

The reasons for a person’s becoming an alcoholic have often been debated by psychologists and other scientists. But recent studies suggest that the problem of alcoholism(酒精中毒) should also be the focus of investigation by biologists.
While such things as hard jobs, boredom, and unhappiness can lead to alcoholism, researchers at a prominent university have found that there may also be a genetic factor involved in alcoholism. In the study, children of alcoholic parents were surveyed. The result showed that the children of alcoholic parents were more likely to become alcoholics themselves than were children of non-drinking parents.
This evidence in itself is not conclusive（令人確信的）about anything. After all, it may be the constant exposure（接觸）and easy access to alcohol that cause the children of alcoholics to become alcoholics themselves. But there is more evidence. The study found that children born of alcoholic parents but raised by non-drinking foster（撫養(yǎng)的）parents also were susceptible to alcoholism. This group of offspring（后代）was more likely to take up drinking than youngsters who were born of and raised by non-drinking parents.
Other evidence found in the study suggests that environment does not play as important a role in the development of alcoholism as had been previously thought. The study found that the likelihood of alcoholism was better predicted from the characteristics of the parents than from such environmental characteristics as type of job or level of income.
63. What is the main point of the passage?
A. To describe the environment in the development of alcoholism.                                
B. To study the psychological factor in the development of alcoholism.
C. To describe how the children of alcoholic parents become alcoholics themselves.        
D. To describe the close link between genetic make-up and alcoholism.
64. According to the passage, what can bring about alcoholism?
A. Biologists’ investigation.                       B. Non-drinking parents.
C. Hard jobs, boredom and unhappiness.             D. Foster parents’ raising.
65. According to the findings of the study, who would be the most likely to become an alcoholic?  
A. A person who had a hard job.
B. A person who was born of alcoholic parents.
C. A person who was raised by drinking foster parents.
D. A person who was born of and raised by non-drinking parents.
66. According to the passage, what should the problem of alcoholism be treated as?
A. A psychological problem.
B. An environmental problem.
C. A biological problem.
D. An educational problem.

查看答案和解析>>

同步練習(xí)冊(cè)答案