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.”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 too much sunlight in the first weeks after they are born |
| D．if parents don’t know a proper way to protect their babies’ eyes |
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 |
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 |
The underlined word “vulnerable” in the passage probably means __________.
| A．easy to be harmed | B．resistant |
| C．protective | D．changeable |
Like any good mother, when Karen found out that another baby was on the way, she did what she could to help her 3-year-old son, Michael, prepare for a new baby. They find out that the new baby is going to be a girl, and day after day, night after night, Michael sings to his sister in Mommy's stomach.
In time, the labor pains come. But complications arise during delivery. Finally, Michael's little sister is born. But she is in serious condition. With alarm in the night, the ambulance rushes the infant to the neonatal intensive care unit at St. Mary's Hospital, Knoxville, Tennessee. The days go by. The little girl gets worse. The pediatric (儿科的) specialist tells the parents, “There is very little hope. Be prepared for the worst.”
Karen and her husband contact a local cemetery about a burial plot. They have fixed up a special room in their home for the new baby, but now they plan a funeral. Michael keeps begging his parents to let him see his sister, "I want to sing to her," he says. But kids are never allowed in Intensive Care. Karen makes up her mind. She will take Michael whether they like it or not. If he doesn’t see his sister now, he may never see her alive.
She dresses him in an oversized suit and marches him into ICU. He looks like a walking laundry basket, but the head nurse recognizes him as a child and shouts, "Get that kid out of here now. No children are allowed. Never disturb patients here.” The mother rises up strongly and said," He is not leaving until he sings to his sister!"
Karen leads Michael to his sister's bedside. He gazes at the tiny infant losing the battle to live. And he begins to sing. In the pure hearted voice of a 3-year-old, Michael sings:" You are my sunshine, my only sunshine, you make me happy when skies are gray…" Instantly the baby girl responds. The pulse rate begins to calm down and becomes steady.
“Keep on singing, Michael.”encouraged Karen with tears in her eyes. "You never know, dear, how much I love you, please don't take my sunshine away."
The next day, the very next day, the little girl is well enough to go home! Woman's Day magazine called it "the miracle of a brother's song". The medical staff just called it a miracle. Karen called it a miracle of Gods love!
Never give up on the people you love.What may the underlined words "the infant" refer to?
| A．The baby | B．Karen | C．Mary | D．Michael |
What do we know about the little sister after she was born?
| A．She was driven to St. Mary's shop. | B．A doctor came to see her in her house. |
| C．She was very thin and couldn't speak. | D．She was in great danger. |
Why did Karen firmly let little Michael see his sister in ICU?
| A．Because he could make his sister alive. |
| B．Because his sister would be sent to a far hospital. |
| C．Because his sister was going to die soon. |
| D．Because his father wanted to take him away. |
What do we know about the head nurse?
| A．The head nurse was careful. | B．The head nurse was rude. |
| C．The head nurse was responsible. | D．The head nurse had no sympathy. |
What is the general idea of the text?
| A．A boy’s singing saved his sister’s life. |
| B．The little girl is well enough to go home. |
| C．Michael's little sister is born with a serious disease. |
| D．No children are allowed to enter the intensive care unit. |
Some people believe that international sport creates goodwill between the nations and that if countries play games together, they will learn to live together. Others say that the opposite is true: international competitions encourage false national pride and lead to misunderstanding and hatred. There is probably some truth in both arguments, but in recent years the Olympic Games have done little to support the view that sport encourages international brotherhood. Not only was there the tragic incident including the murder of athletes, but the Games were also ruined by incidents caused mainly by smaller national contests.
One country received its second-place medals with visible anger after the hockey final. There had been noisy scenes at the end of the hockey match, the losers objecting to the final decisions. They were sure that one of their goals should not have been disallowed and that their opponents’ victory was unfair. Their manager was in great anger when he said, “This wasn’t hockey. Hockey and the International Hockey Federation are finished.” The president of the Federation said later that such behavior could result in the suspension（停赛）of the team for at least three years.
Incidents of this kind will continue as long as sport is played competitively rather than for the love of the game. The suggestion that athletes should compete as individuals, or in non-national teams, might be too much to hope for. But in the present organization of the Olympics there is far too much that encourages aggressive patriotism (爱国主义).According to the author, recently the Olympic Games have ______.
| A．created goodwill between the nations |
| B．brought about only false national pride |
| C．hardly showed any international friendship |
| D．put an end to misunderstanding and hatred |
The underlined word “disallowed”(in Paragraph 2) means “______”.
| A．permitted to pass | B．considered as reasonable |
| C．won by the other side | D．refused to accept |
What did the manager mean by saying, “Hockey and the International Hockey Federation are finished"?
| A．His team would no longer take part in international games. |
| B．Hockey and the Federation are both ruined by the unfair decisions. |
| C．There should be no more Hockey matches organized by the Federation. |
| D．The Federation should break up. |
The author gives the example in paragraph 2 to show ______.
| A．how false national pride led to undesirable incidents in international games |
| B．that sportsmen are often against the final decisions |
| C．that competitiveness in the games discourages international friendship |
| D．that unfair decisions are common in the Olympic Games |
What conclusion can be drawn from the passage?
| A．The organization of the Olympic Games must be improved. |
| B．Athletes should compete as individuals in the OlympicGames. |
| C．A game should be played competitively rather than for the love of the game. |
| D．More and more athletes will compete for their own honor. |
Dad loved children. And he always wanted a 21 family. Eventually, he got what he wanted with twelve children in the family. Without fail, he would show us all to visitors.
Once, Dad 22 presented the first three children in the family, Ann, Mary and Ernestine, to some visitors. Then he picked up a fourth child, and said, “And this is our 23 model, complete with all the improvements. And don’t think that this is all, we are 24 the 1953 model some time next month.”
But what he 25 most was taking us out for a drive. On one occasion a man in a village we were passing through shouted 26 that he had seen eleven people in our car, not 27 Mum and Dad. 28 , Dad called out over his shoulder, “You 29 the second baby up from the front here, Mister.”
Another time, Dad told us this joke, though we were not sure whether he was telling us the 30 . Mum, who was a psychologist, once went to give a lecture and left Dad in charge of the 31 . When Mum returned, she asked him if everything had been OK. He said everything was 32 except that one of the children had been taught a lesson because he had been 33 . When he pointed at the child that had been 34 Mum looked at him calmly and said, “That’s not one of ours, dear. He 35 next door.”
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If you are afraid of the dark，it’s not a big deal．It’s perfectly normal to feel afraid After all，animals do too. “Fear matters，”says Karen Warkentin，an ecologist．“It’s a good thing，” she adds, “because fear makes you do things that keep you alive.”
Like kids，many animals experience fear and they respond to the feeling in variety of ways．A frightened turtle pulls its head and legs inside its shell．A small fish will swim away when a big，hungry fish approaches．
Some animals respond to fear in ways you might not expect．The first example is that the fear of being eaten can scare some frogs right out of their eggs. Warkentin made the surprising discovery while studying red—eyed tree frogs in Costa Rica.
In this species，female frogs attach jellylike clumps（果冻一样的块状物）of their eggs to the undersides of leaves．The leaves hang on branches that dangle（悬挂）over ponds．After they hatch from the eggs，the tadpoles（蝌蚪）then fall into the water，where they eventually grow into adult frogs.
Tree frog eggs usually grow for 6 days before hatching．If they sense that a hungry snake is about to attack，however，they can hatch up to 2 days ahead of schedule. As the snakes are unable to swim，by falling into the water early，the tadpoles can escape.
If hatching early helps protect red—eyed tree frogs from snakes，you might wonder why their eggs don’t always hatch sooner．It turns out that hatching early brings its own danger．Once tadpoles land in the water，hungry fish and other animals like to eat them too．Staying in their eggs for a full 6 days，then，allows frog embryos（胚胎）to grow big and strong．This extra growth improves their chances of surviving in the water．It can be inferred from the passage that fears.
| A．help animals grow bigger and stronger |
| B．are less common among young animals |
| C．help animals move a lot to fit the environment |
| D．are more or less important in order for animals to survive |
We are told in the passage that tree frogs .
| A．face danger both inside their eggs and in the water |
| B．will grow fast if they fall into the water later |
| C．are surprisingly clever when inside their eggs |
| D．stay in their eggs longer if they are frightened |
Why do the tadpoles hatch up to 2 days ahead of the schedule？Because
| A．They like falling into the water early |
| B．They want to grow into adult frog |
| C． They sense a hungry snake is about to attack |
| D．Frog embryos can grow strong |
What is the best title of the passage ？
| A．What is Fear | B．Why do we feel afraid |
| C．You feel afraid，animals do too | D．Fear is a good thing |
What do you think would be discussed in the following paragraph?
| A．Further explanations as to why tree frogs hatch ahead of schedule． |
| B．How the unborn frogs know when a snake is about to attack them． |
| C．Another example of animals that responds to fear in an unexpected way． |
| D．How tree frogs improve their chances of survival before falling into the water. |
BEIJING , March 9 --- The central government will require an additional three years of use for official vehicles for ministers and governors to reduce the costs of purchasing new cars, media have reported.
The new rule has been applied among all Party and government departments nationwide, the Beijing News reported on Tuesday. The new rule has not yet been made public, said Li, a member of the Chinese People’s Political Consultative Conference National Committee.
Under the old rules, the cars used by minister-level officials could be replaced as often as every five years, Li said. These officials will also keep the same cars when they assume new posts, he added.
The new rule also reiterated(重申) that officials ranking below minister-or-governor-levels should not be allocated cars. The cars possessed by their departments should be used on demand.
“It violates the rules for lower-ranking --- even county-level-officials to be allocated cars,” Li said.
Purchases of vehicles for official use have been heavily investigated, as they account for a large expenditure (花费) of public funds every year.
A survey on the Web news www.ifeng.com found 64 percent of respondents believed the new rule will be difficult to carry out because it is related to officials’ interests.
“Local government departments had halted(中断) approvals for requests for such vehicles and had started to work on new quotas(指标) under the new rules,” Li said. “The future reform of official vehicle use will introduce market mechanisms and monetization.”
Premier Wen Jiabao said in the annual government work report on Saturday that expenditures on such vehicles will not increase in 2011 compared with a year ago.
Beijing’s standing deputy mayor Ji Lin last week said the municipal (市政的) government will release the number of vehicles for official use in the capital as early as at the end of this month.
Earlier this month, the Minister of Finance had published a rule regulating the budgets for such vehicles.What is the purpose of the new rule allocating vehicles among officials?
| A．To promote a low-carbon lifestyle. |
| B．To cut down the present huge expenditures of purchasing cars. |
| C．To make good use of budgets for official cars. |
| D．To solve the problem of severe traffic jam. |
How often could the cars used by minister-level officials be replaced according to the new rule?
| A．Every 3 years. | B．Every 5 years. | C．Every 8 years. | D．Every 10 years. |
What about the officials ranking below minister-or-governor levels in terms of official vehicles?
| A．They can still possess special cars. |
| B．They can use their own private cars. |
| C．They can use cars whenever officially necessary. |
| D．They can be allocated second-hand cars. |
What is the public’s attitude toward the new rule’s fulfillment?
| A．Uncertain. | B．Optimistic. | C．Indifferent. | D．Passive |
From the passage, we can infer that_________.
| A．the government is determined to carry out the new rule |
| B．the new rule has not yet been made public |
| C．the new rule will benefit official’s interest |
| D．the new rule is applied to minister-level officials |