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'.
As Apple tries to maintain its growth and success in China, the world's largest smart-phone market is becoming even more critical. Apple's shares(股份) fell sharply as the company's earnings for the holiday quarter through December disappointed investors.
The sales of the iPhone, which include both the iPhone 5 and older models, came in at the low end of analysts' expectations, while the company's income plan for the second quarter was below analysts' forecasts, though Apple is known to give conservative (保守的) forecasts.
Some analysts have said that for Apple to regain its growth, the company needs a more aggressive strategy(进攻型策略) for markets, or more specifically for China, where the market for smart phones has been expanding more rapidly than anywhere else. In China, demand is particularly great for inexpensive phones that run on Android(安卓) operating system, sold by many Chinese phone makers as well as South Korea's Samsung Electronics Co.
But Apple says it's already enjoying strong growth in China. "We saw big growth in iPhones," Chief Executive Tim Cook said. He said that the company has been quickly expanding its sales channels in China, including the number of Apple stores. "This isn't nearly what we need, we're not even close to that, but we're making great progress.” he said.
In China, a big missing piece for Apple is China Mobile Ltd. , the biggest local telecom carrier that doesn't yet sell the iPhone. Earlier this month, Mr. Cook met China Mobile Chairman Xi Guohua in Beijing and discussed cooperation, stirring hopes that the world's largest mobile carrier may soon start offering the iPhone.
Earlier this month, the Wall Street Journal reported that Apple is working on a lower-end iPhone that could launch as early as this year. But one possible challenge for Apple in China is that low-priced Android-based phones are getting better in terms of quality. A report from CLSA in late November showed that many smart-phones sold at about1,000 yuan ($160) came with higher- resolution screens, better cameras and more powerful processors than phones at that price did a year earlier.
1.Apple's shares dropped sharply because in December______________.
A．the iPhone wasn't popular in China
B．its product quality was widely criticized
C．the earnings for the holiday quarter was disappointing
D．the investors were not satisfied with Apple's management
2.What can we learn from the passage?
A．Apple tends to offer a lower sales forecast.
B．China Mobile Ltd began to team up with Apple.
C．Cook is pessimistic about what Apple did in China.
D．Apple didn't take measures to develop Chinese market.
3.The author uses the report from CLSA to prove _____.
A．their prices are actually lower than a year earlier
B．Apple in China has ability to deal with any problem
C．low-ended Android-based phones are progressing fast
D．the promotion of lower-end iPhone will face a challenge
4.The main purpose of the passage is to show the readers ______________.
A．Apple's high popularity in China
B．the challenge Apple faces in China
C．the approaching failure Apple will suffer in China
D．Apple's aggressive strategy in its market expansion
Som'6 analysts have said that for Apple to regain its growth, the company.needs a more aggressive strategy for markets, or more specifically for China, where the market for smart phones has been expanding more rapidly than anywhere else. In China, demand is particularly great for inexpensive phones that run on Android(安卓) operating system, sold by many Chinese phone makers as well as South Korea's Samsung Electronics Co.
But Apple says it's already enjoying strong growth in China. "We saw big growth in iPhones,"Chief Executive Tim Cook said. He said that the company has been quickly expanding its sales channels in China, including the number of Apple stores. "This isn't nearly what we need, we're not even close to that, but we're making great progress. " he said.
Earlier this month, the Wall Street Journal reported that Apple is working on a lower-end iPhone that could launch as early as this year. But one possible challenge for Apple in China is that low-pricod Android-based phones are getting better in terms of quality. A report from CLSA in late November showed that many smart-phones sold at about 1,000 yuan ( $160) came with higher-reso-lution screens, better cameras and more powerful processors than phones at that price did a year earlier.
1.Apple's shares dropped sharply because in December__
3.The author uses the report from CLSA to prove
4.The main purpose of the passage is to show the readers __
A．Apple.'s high popularity in China
1.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.
2.How can people get Vitamin D?
A.through water. B. through sunshine.
C.through food. D.both B and C.
3.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.
A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.
Vitamin D is produced naturally by the skin in response to(对…的反应) 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 become more susceptible(易受伤害的) to certain illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres--- a sign of being biologically younger and healthier.
Lead researcher Dr Brent Richards said, “These results are exciting because they show 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.”
Professor Tim Spector, a co-author of the report, added, “Although it might sound absurd
(荒唐的), 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 percent of the body’s supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).
1. A certain amount of sunshine helps people stay young because _____.
A. people feel happy and energetic in the sun
B. sunshine protects people against heart disease
C. vitamin D makes one’s skin look young and healthy
D. vitamin D may help to slow the ageing process
2.From Brent Richards, we know that _____.
A. sunlight causes skin cancer to people with high level of vitamin D
B. the study generally has a healthy effect on the general ageing process
C. vitamin D can only be got from fish, eggs and breakfast cereals
D. the higher levels of vitamin D people have, the more slowly people may age
3.What can we infer from the passage?
A. Telomeres are important signs of ageing of the DNA.
B. Sunlight can be dangerous as it causes skin cancer.
C. Sunlight does a great deal of good to our health.
D. Vitamin D can also be gained from food.
4. What is the best title of the passage?
A. Secret of Staying Young B. Vitamin D Helps Slow Ageing
C. Sunlight and Vitamin D D. Sunlight and Health
