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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(荒謬的), 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
英國科學家日前公布，長期堅持曬太陽可能是永葆青春的秘訣。
64．主旨大意題。根據(jù)文章第一段主題段可以看出，長期堅持曬太陽可能是你永葆青春的秘訣。
65．細節(jié)理解題。根據(jù)倒數(shù)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，維生素D主要通過日曬獲得，也可通過食物獲得。
66．詞意理解題。根據(jù)第三段第二行：looking at their telomeres - a biological marker of ageing found in DNA.可以看出，telomeres，是位于染色體末端的DNA微粒。
67．細節(jié)判斷題。根據(jù)倒數(shù)第四段He said further studies are required to confirm the findings.可以看出，還需要進一步的研究證實這項發(fā)現(xiàn)。
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科目：高中英語 來源：不詳 題型：閱讀理解



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科目：高中英語 來源：不詳 題型：閱讀理解

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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（治療）.
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A. can be deadly if only a small amount is used
B. causes a lot of trouble for many parents
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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
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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

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科目：高中英語 來源：不詳 題型：閱讀理解

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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

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