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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.
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 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).
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
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
查看习题详情和答案>>
| 完型填空 | |||
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Robert performs his 24-foot boat past willow(柳树) young trees that stick out of the waters of the | |||
| ( )1. A. Sunlight ( )2. A. ripe ( )3. A. wider ( )4. A. placed ( )5. A. ever ( )6. A. come ( )7. A. work ( )8. A. on ( )9. A. alone ( )10. A. large ( )11. A. supporters ( )12. A. family ( )13. A. came ( )14. A. clean ( )15. A. burned ( )16. A. ending ( )17. A. biggest ( )18. A. deed ( )19. A. time ( )20. A. return |
B. Air B. brown B. quicker B. piled B. even B. save B. discovery B. in B. strongly B. happy B. workers B. team B. pulled B. cover B. buried B. progress B. earliest B. favor B. joy B. turn |
C. Water C. falling C. closer C. trapped C. nearly C. head C. place C. off C. quietly C. impossible C. engineers C. grade C. pushed C. build C. used C. discussion C. latest C. same C. pride C. pay |
D. Moonlight D. fresh D. stricter D. thrown D. merely D. fight D. effort D. along D. fiercely D. possible D. pioneers D. class D. appeared D. spread D. recycled D. common D. luckiest D. good D. waste D. trouble |
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.
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 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).
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
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
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
B. Sunlight can be dangerous as it causes skin cancer.
C. Sunlight does more good than harm to our health.
D. Vitamin D can also be gained from food.
B. Vitamin D Helps Slow Ageing
C. Sunlight and Vitamin D
D. Sunlight and Health
B. Because she had a quarrel with her workmates.
C. Because her boss lost his temper at her.
B. They have broken their contract.
C. The boss's office was stolen.
B. Husband and wife
C. Boss and worker
阅读下面短文，掌握其大意，然后从各题所给的四个选项中，选出一个最佳答案.
Chad performs his 24-foot aluminums boat past willow young trees that stick out of the waters of the Mississippi River. 1 dances off maples（枫树）,their branches heavy with 2 spring leaves. But a 3 inspection discloses trouble behind the beautiful sight. Rubbish is 4 in a logjam（河道内运完木材所剩的木头）and hangs from the tree's branches.
5 the next three hours Chad and his team pull plastic bags, tanks, bottles and 6 bowling pins out of the water. Then they 7 for a picnic table caught in the trees.
Welcome to the Mississippi River Beautification & Restoration Project began in1997 as Chad's one-man 8 to pick up rubbish along a 400-mile stretch of the2340-mile river That year, often working 9 , the 22-year-old young man cleaned 150 miles of shoreline.
At first the project appeared 10 and useless. But Chad tried his best to find 11 , and with their backing, he soon had a new boat and a five-man-team-- the Boom Crane Crew. Last year alone the crew 12 from the water44055-gallon drums, 1104 tires and enough plastic bags to cover a football field. Much of the waste will be 13 .
“Chad's operation is the only one actually in 14 on the river,”says Mark of the Mississippi River Basin Alliance, a union of environmental groups.“It's the 15 I've ever seen in 20 years, and he is inspiring others to do the 16 .”
“The Mississippi was my back 17 ,”Chad says. In his teens he and his brother worked on the river as clambers（掘蚌者）and camped on islands 18 the waterway.“The river has given me a livelihood and brought me so much 19 ,”Chad says.“I wanted to do something in 20 .”
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