Babies born in summer are more likely to become short-sighted in late life, a study has shown.
As many as a quarter of all cases of short-sightedness are caused by too great an exposure to sunlight in the first weeks of life, say eye experts.
They are advising all parents to put sunglasses on their babies during the first weeks.
Scientists had already established that over-exposure to sunlight caused short-sightedness in animals.
Researchers who compared the months in which babies were born with whether they needed glasses later on say the principle also applies to humans.
A study of almost 300,000 young adults─the largest of its kind─showed that those born in June and July had a 25 per cent greater chance of becoming severely short-sighted than those born in December or January. Research leader Professor Michael Belkin, of Tel Aviv University, said it was because prolonged illumination(光照) causes the eyeball to lengthen, causing short-sightedness.
Hence the more light a newborn is exposed to, the more the eyeball lengthens and the worse the short-sightedness will be.
The mechanism which lengthens the eyeball is associated with levels of melatonin(褪黑激素), a pigment (色素) which protects the skin against harmful rays of the sun.
In young babies not enough melatonin is released as protection, meaning they are more vulnerable to sunburn and changes to eyeball shape.
Sight expert Professor Daniel O’Leary, of Anglia Ruskin University in Cambridge, said “At the moment we don’t know the precise cause of why light exposure affects sight, but the evidence seems to prove that it is one of the reasons for people becoming short-sighted.”
55. Babies born in summer are more likely to be short-sighted ____________.
A. because the summer sun is too strong for babies
B. because babies born in summer have lengthened eyeballs
C. if they are exposed to much sunlight in the first weeks after they are born
D. if parents don’t know a proper way to protect their babies’ eyes
56. Melatonin is a kind of material to ___________.
A. prevent the eyes from becoming near-sighted
B. protect the skin from harmful sun rays
C. make our body strong
D. protect babies’ eyes from summer sun
57. From what Professor Daniel O’Leary says we can conclude that ___________.
A. there is no evidence that short-sightedness is related to exposure to sunlight
B. whether light exposure affects sight still needs to be further proved
C. he believes that light exposure can cause short-sightedness
D. he tries to give the cause of why light exposure affects sight
58. The underlined word “vulnerable” in the passage probably means __________.
A. easy to be harmed B. resistant
C. protective D. changeable
通城学典默写能手系列答案科目：高中英语 来源： 题型：阅读理解
If the world were a village of 1,000 people it would include:
?? 584 Asians
?? 124 Africans
?? 95 Eastern and Western Europeans
?? 84 Latin Americans
?? 55 former Soviets （ including Lithuanians, Latvians, Estonians, and other national groups）
?? 52 North Americans
?? 6 Australians and New Zealanders
The people of the village would speak:
?? 165 Mandarin
?? 86 English
?? 83 Hindu/Urdu
?? 64 Spanish
?? 58 Russian
?? 37 Arabic
The above list covers the mother tongues of only half the village.
One-third of the people in the village are children, and only 60 are over the age of 65. Just under half of the married women in the village have access to modem equipments.
This year 28 babies will be born. Ten people will die, 3 of them for lack of food, 1 from can??cer. Two of the deaths will be of babies born within the year. With the 28 births and 10 deaths, the population of the village next year will be 1,018.
In this village of 1,000 persons, 200 people receive 75 percent of the income; another 200 re??ceive only 2 percent of the income.
About one-third have access to clean, safe drinking water.
Of the 670 adults in the village, half can not read nor write.
The village has a total yearly budget （预算）, public and private, of over $3 million—$ 3,000 per person if it is distributed evenly. Of the total $3 million:
$ 181,000 goes to weapons and warfare
$ 159,000 to education
$ 132,000 to health care
These weapons are under the control of just 100 of the people. The other 900 are watching them with deep anxiety, wondering whether they can learn to get along together.
60. Which of the following is true about Mandarin according to the text?
A. Nearly one-third of Asian people speak Mandarin in the village.
B. About 8.25 per cent of the people speak Mandarin in the village.
C. About 16. 5 per cent of the people speak Mandarin in the village.
D. Nearly all the Mandarin-speaking people are from Asia in the village.
61. Which of the following problems is NOT mentioned in the text?
A. Poverty. B. Education. C. Environment. D. Marriage.
62. The underlined part “have access to” （in Para. 4（ means_____.
A. use B. buy C. produce D. try
63. The last sentence in the text implies that most of the people long for _____.
A. a peaceful world B. good education
C. better health care D. a life without anxiety
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科目：高中英语 来源：2010-2011黑龙江庆安三中高二下学期期中考试英语试卷 题型：阅读理解
Since the gene , called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging ,immunity and resistance in humans the scientists said.
“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits such as immunity,”said Robin May , who led the study.
Populations across the world are aging at a surprising pace , bring potentially big challenges for health and social care systems . A study by Danish scientists last year found that half of babies born in rich world today will live to celebrate their 100th birthday . Scientists are eager to find out how people age to try to develop drugs to help them stay healthier lives extend.
“What we have found is that things like resistance and aging tend go hand in hang “ May said in an interview
May’s team compared longevity ,stress resistance and immunity in four related species of worm. They also looked for differences in the activity of DAV-16 in each of the four species and found that they were all quite distinct.
May said DAF-16 was active in most cells in the body and was very similar to a group of human genes called FOXO genes , which scientists believe play a role in the aging process. “The fact that subtle differences in DAF-16 between species seem to have such an impact on aging and health is very interesting and many explain how differences in lifespan and related traits have arisen during evolution，”May said
【小题1】In which section may the text appear in a newspaper?
A Education B Science C Entertainment D Culture
【小题2】 According to May ,
A resistance has a lot of to do with aging B FOXO genes can be found in worms
C genes play the same role in difference species D new drugs will change the genes in older people
【小题3】From the text we know that DAF-16
A is a gene that is only found in worms B can make people live longer
C has an effect on aging and immunity D has been quite familiar to scientists
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科目：高中英语 来源：2012-2013学年辽宁省五校协作体高二上学期联合竞赛英语试卷（带解析） 题型：填空题
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
【小题1】 But science may have just proved them right – because beautiful women are more likely to have daughters than their plainer counterparts, according to a study.
As parents tend to pass on genes that determine looks, this could result in handsome men becoming rather thin on the ground. 【小题2】 For example, Yasmin Le Bon is signed to the same modelling agency as daughter Amber, and Jerry Hall’s daughters Elizabeth and Georgia Jagger have both taken to the catwalk.
Dr Satoshi Kanazawa, of the London School of Economics, analysed data from a survey of 17,000 babies born in Britain in March 1958 and tracked them throughout their lives. 【小题3】 When they reached 45, they were asked about the gender of any children they had.
Those rated as attractive were equally likely to have a son or daughter as their first child – but the unattractive sorts were more likely to have a son. 【小题4】
Dr Kanazawa believes that parents tend to produce children who benefit from their own features. 【小题5】 So it pays for attractive women to have daughters. But couples blessed with strength and aggression rather than looks are better off having boys, as these characteristics are of more use to males.
| A．Women are becoming more beautiful over the generations because attractive women have more children than plain ones. |
| B．Single girls have always complained that good-looking men are difficult to find. |
| C．Beauty is of more benefit to a woman than a man. |
| D．At the age of seven, their attractiveness was rated by their teachers. |
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科目：高中英语 来源：2014届辽宁省五校协作体高二上学期联合竞赛英语试卷1（解析版） 题型：信息匹配
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
71 But science may have just proved them right – because beautiful women are more likely to have daughters than their plainer counterparts, according to a study.
As parents tend to pass on genes that determine looks, this could result in handsome men becoming rather thin on the ground. 72 For example, Yasmin Le Bon is signed to the same modelling agency as daughter Amber, and Jerry Hall’s daughters Elizabeth and Georgia Jagger have both taken to the catwalk.
Dr Satoshi Kanazawa, of the London School of Economics, analysed data from a survey of 17,000 babies born in Britain in March 1958 and tracked them throughout their lives. 73 When they reached 45, they were asked about the gender of any children they had.
Those rated as attractive were equally likely to have a son or daughter as their first child – but the unattractive sorts were more likely to have a son. 74
Dr Kanazawa believes that parents tend to produce children who benefit from their own features. 75 So it pays for attractive women to have daughters. But couples blessed with strength and aggression rather than looks are better off having boys, as these characteristics are of more use to males.
|
A．Women are becoming more beautiful over the generations because attractive women have more children than plain ones. |
|
B．Single girls have always complained that good-looking men are difficult to find. |
|
C．Beauty is of more benefit to a woman than a man. |
|
D．At the age of seven, their attractiveness was rated by their teachers. |
E. Put another way, the beautiful women were more likely to have daughters.
F. And it may also explain why many models have daughters who follow in their fascinating footsteps.
G. Famously good-looking parents like Tom Cruise and Katie Holmes are more likely to have girls than uglier couples.
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科目：高中英语 来源：2010届黑龙江双鸭山一中高三上学期期末考试英语试卷 题型：阅读理解
Babies born in summer are more likely to become short-sighted in late life, a study has shown.
As many as a quarter of all cases of short-sightedness are caused by too great an exposure to sunlight in the first weeks of life, say eye experts.
They are advising all parents to put sunglasses on their babies during the first weeks.
Scientists had already established that over-exposure to sunlight caused shortsightedness in animals.
Researchers who compared the months in which babies were born with whether they needed glasses later on say the principle also applies to humans.
A study of almost 300,000 young adults-the largest of its kind-showed that those born in June and July had a 25 per cent greater chance of becoming severely short-sighted than those born in December or January.
Research leader Professor Michael Belkin, of Tel Aviv University, said it was because prolonged illumination(光照) causes the eyeball to lengthen-causing short-sightedness.
Hence the more light a newborn is exposed to, the more the eyeball lengthens and the worse the short-sightedness will be.
The mechanism which lengthens the eyeball is associated with levels of melatonin(褪黑激素), a pigment (色素) which protects the skin against harmful rays of the sun.
In young babies not enough melatonin is released as protection, meaning they are more vulnerable to sunburn and changes to eyeball shape.
Sight expert Professor Daniel O’Leary, of Anglia Ruskin University in Cambridge, said “At the moment we don’t know the precise cause of why light exposure affects sight, but the evidence seems to prove that it is one of the reasons for people becoming shortsighted.”
67. Babies born in summer are more likely to be shortsighted ____________.
A. because the summer sun is too strong for babies
B. because babies born in summer have lengthened eyeballs
C. if they are exposed to much sunlight in the first weeks after they are born
D. if parents don’t know a proper way to protect their babies’ eyes
68. Melatonin is a kind of material to ___________.
A. prevent the eyes from becoming near-sighted
B. protect the skin from harmful sun rays
C. make our body strong
D. protect babies’ eyes from summer sun
69.From what Professor Daniel O’Leary says we can conclude that ___________.
A. there is no evidence that shortsightedness is related to exposure to sunlight
B. whether light exposure affects sight still needs to be further proved
C. he believes that light exposure can cause shortsightedness
D. he tries to give the cause of why light exposure affects sight
70.The underlined word “vulnerable” in the passage probably means __________.
A. easy to be harmed B. resistant
C. protective D. changeable
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