Up to 90% of school leavers in major Asian cities are suffering from myopia ---short-sightedness, a study suggests. Researchers say the "extraordinary rise" in the problem is being caused by students working very hard in school and missing out on outdoor light.
Eye experts say that you are short-sighted if your vision is blurred(模糊的) beyond 2m. It is often caused by an elongation（拉伸） of the eyeball that happens when people are young. According to the research, the problem is being caused by a combination of factors - a commitment to education and lack of outdoor light.
Professor Morgan who led this study argues that many children in South East Asia spend long hours studying at school and doing their homework. This in itself puts pressure on the eyes, but exposure to between two and three hours of daylight helps maintain healthy eyes.
Cultural factors also seem to play a part. Across many parts of South East Asia, children often have a lunchtime nap. According to Professor Morgan they are missing out on natural light to prevent short-sightedness.
A big concern is the numbers of the students suffering from “high” myopia. One in five of these students could experience severe visual impairment(障礙) and even blindness. These people are at considerable risk—sometimes people are not told about it and are just given more powerful glasses—they need to be warned about the risk and given some self-testing measures so they can get to an ophthalmologist and get some help.
For decades, researchers believed there was a strong genetic component to the condition. But this study strongly suggests an alternative view. “Any type of simple genetic explanation just doesn’t fit with that speed of change; gene pools just don’t change in two generations. Whether it’s a purely environmental effect or an environmental effect playing a sensitive genome, it really doesn’t matter, the thing that’s changed is not the gene pool---it’s the environment.”
小題1:As is mentioned above, which factor mainly results in students’ myopia in South East Asia?
A．Genetic faults of the people.B．Elongation of the eyeball.
C．The shortage of outdoor light.D．Lack of research into the problem.
小題2:Which of the following statements do you think agrees with Professor Morgan?
A．A lunchtime nap is helpful in reducing myopia.
B．Glasses keep myopia from getting even worse.
C．It’s necessary to treat myopia with an operation.
D．It’s of vital importance to reduce educational pressure.
小題3:What’s the main idea of the last paragraph?
A．Gene remains the main cause of the long-standing problem.
B．The environment is to blame for the extraordinary rise in myopia.
C．Short-sightedness has nothing to do with changes in gene pools.
D．An environmental effect playing a sensitive genome counts.
小題4:What’s the best way to take care of your eyes according to the passage?
A．Equip the classroom with better lights.
B．Look at the sun from time to time.
C．Do eyes exercise regularly.
D．Spend more time in the open air.

小題1:C
小題2:D
小題3:B
小題4:D

試題分析：本文講述的是如何保護(hù)好我們的眼睛不要受到近視的影響，分析了原因，并提出了解決的方法，就是多倒戶外去運(yùn)動(dòng)。
小題1:C 細(xì)節(jié)題。根據(jù)文章第一段最后一句Researchers say the "extraordinary rise" in the problem is being caused by students working very hard in school and missing out on outdoor light.說(shuō)明C項(xiàng)才是主要原因。
小題2:D 細(xì)節(jié)題。根據(jù)文章第三段前三行Professor Morgan who led this study argues that many children in South East Asia spend long hours studying at school and doing their homework. This in itself puts pressure on the eyes,說(shuō)明D正確。
小題3:B 段落大意題。根據(jù)本段的主題句最后一句Whether it’s a purely environmental effect or an environmental effect playing a sensitive genome, it really doesn’t matter, the thing that’s changed is not the gene pool---it’s the environment.”說(shuō)明環(huán)境才是最主要的原因。故B正確。
小題4:D 細(xì)節(jié)題。根據(jù)文章2,3段的最后一句According to the research, the problem is being caused by a combination of factors - a commitment to education and lack of outdoor light.
exposure to between two and three hours of daylight helps maintain healthy eyes.
說(shuō)明多花時(shí)間在戶外對(duì)這種病癥是有很大的作用的。故D正確。
點(diǎn)評(píng)：本文講述的是如何保護(hù)好我們的眼睛不要受到近視的影響，分析了原因，并提出了解決的方法，就是多倒戶外去運(yùn)動(dòng)。本文主旨鮮明,很容易在文中找到答案。做題時(shí)要注意文章的首段和每一段的首句或尾句，因?yàn)樗鼈兺褪俏恼碌闹黝}句。閱讀中要注意要點(diǎn)之間的關(guān)系。然后帶著問(wèn)題，再讀全文，找出答題所需要的依據(jù)，完成閱讀任務(wù)。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

An allergy is a strong reaction to a substance. Many things can cause allergies. The most common cause is pollen (花粉), which is usually produced by trees in the spring, grasses in the summer and weeds in the fall, as part of their reproductive process.
Other causes include organisms, chemicals, plants and dead skin particles from dogs and cats can also cause allergic reactions. So can insect stings and some food.
The most common kind of allergic reactions is itchy (癢的) , watery eyes and a blocked or watery nose. Allergies can also cause red, itchy skin. Some reactions can be life-threatening, for example, when breathing passages become blocked.
It is not always easy to avoid allergies. Drugs may offer an effective treatment. Another treatment used in some cases is called immunotherapy. A patient is injected with small amounts of the allergy-causing substance. The idea is that larger and larger amounts are given over time until the patient develops resistance in his body.
In the United States, experts estimate that up to 8% of young children have food allergies. Every year these allergies cause about 30,000 cases with severe reactions that require immediate treatment. It can result in breathing trouble and in some cases death. It is said that about 100 to 200 people will die. It is said that most of the reactions are caused by peanuts and tree nuts like walnuts.
People can also be allergic to medicines. The American Academy of Allergy, Asthma and Immunology says about 10％ of bad reactions to commonly used medicines are allergic. In other words, a person’s immune system overreacts and produces an allergic reaction. The most common reactions include skin rashes, itching, breathing problems and swelling in areas such as the face.
小題1:Allergies seldom occur in winter because ________.
A．plants don’t usually flower in cold weather
B．people usually wear thick clothes
C．pollen is active below freezing point
D．the weather is too cold for viruses
小題2:What will happen if one’s breathing passages get blocked?
A．It is nothing serious.B．One’s life is at risk.
C．One has to be sent to hospital.D．One is sure to breathe easily.
小題3:According to immunotherapy, the patient is supposed to________.
A．take some medicines to produce antibodies
B．have immediate operations
C．be given the allergy-causing substance until the patient develops resistance
D．be exposed to enough allergy-causing substances
小題4:The best title would be _______.
A．The ABCs of AllergiesB．The Cause of Allergies
C．The Treatment of AllergiesD．The Prevention of Allergies

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

I know what you’re thinking: pizza? For breakfast? But the truth is that you can have last night’s leftovers in the morning if you want to.
I know lots of women who don’t have breakfast, and they have many different excuses for doing it. Some say they don’t have time, others think they’re “saving” calories（卡路里）, still others just don’t like breakfast food.
But eating in the morning is very important when you’re trying to lose weight. Eating just about anything from 300 to 400 calories would be better than nothing at all.
Breakfast is one meal I never miss, and the same goes for most weight loss success stories. Research shows that eating breakfast keeps you from overeating later in the day. Researchers found that those who don’t have breakfast have a bigger chance of gaining weight than those who regularly have a morning meal.
So eat something in the morning, anything. I know plenty of friends who end up having no breakfast altogether, and have just coffee or orange juice. I say, try heating up last night’s leftovers-it may sound crazy, but if it works for you, do it! I find if I tell myself, “You can always eat it tomorrow,”I put away the leftovers instead of eating more that night. Try it…you may save yourself some pre-bedtime calories. And watch your body gain the fat-burning effects.
小題1:The word “l(fā)eftovers” in Paragraph 1 probably means __________.
A．pizza topped with fruitB．things left undone
C．food remaining after a mealD．meals made of vegetables
小題2:According to the last paragraph, it is important to__________.
A．be careful about what you eatB．eat something for breakfast
C．heat up food before eating itD．eat calorie-controlled food
小題3:What can we infer from the text?
A．Many people have wrong ideas about breakfast.
B．Working women usually have breakfast in a hurry.
C．There are some easy ways of cooking a meal.
D．Eating vegetables helps save energy.
小題4:The text is written mainly for those__________.
A．who go to work earlyB．who go to bed late
C．who eat before sleepD．who want to lose weight
小題5:What does the author advise the readers to do?
A．Better eat up all the food at dinner in the night.
B．Better eat less in the night.
C．Better eat leftovers in the morning.
D．Better get up late and eat nothing in the morning in order to burn more calories.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

The smell of fresh air is becoming something of a distant memory, thanks to our increasing use of fragrance (香氣). From air fresheners to scented (有香味的) candles, we live in a world of scent.
Recent figures show seven in ten people use air fresheners or scented candles to keep our homes smelling sweet. Yet recent records suggest that perfumed products could affect our health, causing problems including allergies (過(guò)敏), headaches and asthma (哮喘) .
One leading expert believes nearly a third of people suffer health effects from being exposed to scents. A major problem is so-called “contact” allergy—where perfumes and scented products cause eczema (濕疹) when they come into contact with the skin. About one in 20 is thought to be affected by fragrance allergy.
“Often it may not be immediately obvious that you have developed a fragrance allergy,” says Dr. Baron. “You don’t react immediately. Gradually, as you are exposed more and more, the body increases its reaction, until it becomes noticeable to you.”
People with pre-existing eczema are particularly vulnerable (易受影響). “The eczema worsens in areas in contact with perfumes,” says Dr. Baron. “But even those without allergies can be at risk of fragrance allergy.” You can become suddenly allergic to perfumes and personal care products that you have been using for years. “Even if you know which fragrance causes a problem, it can be difficult to avoid, as most personal care products –soap, shampoo, sun cream and washing powder—contain fragrances,” says Dr. Baron.
And strong scents can also cause headaches. Fragrances activate the nose’s nerve cells, stimulating the nerve system associated with head pain. To minimize risk, sufferers are advised to minimize the contact.
“Fragrance suggest cleanliness – yet people are smelling a potentially dangerous chemical mixture,” says Anne Steinemann, professor of the University of Washington. “We often use them to mask one problem – as with air fresheners – but create a greater one – adding poisonous chemicals to the air.”
小題1:What is the text mainly about?
A．The world trend of using fragrance.
B．The benefits of using non-fragranced products.
C．The health problems caused by fragrance
D．The ways of removing allergy.
小題2:According to Dr. Baron,            .
A．our bodies have an immediate reaction to fragrance.
B．seven in ten have suffered fragrance allergy.
C．fragrance can affect people who don’t have allergy
D．people can avoid contacting with fragrance easily
小題3:Which of the following questions does the text NOT answer?
A．Which products contain fragrance?
B．What’s the influence of fragrance in the air?
C．What are the air fresheners made up of?
D．How are headaches caused by fragrance?
小題4:The following paragraph might discuss            .
A．the asthma caused by strong scents.
B．people’s efforts to protect fresh air.
C．the methods of curing eczema
D．the bad effects of air fresheners.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

（共5小題，每小題3分，滿分15分）
根據(jù)短文內(nèi)容,從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)是多余選項(xiàng)。
You may know the benefits of laughter on the mind and spirit. __1__. Norman Cousins used to say that laughter is so beneficial for your body that is like “inner jogging”.
Mayo Clinic Health Letter reports that laughter aids breathing by increasing your breathing rate. It can even help clear mucus (粘液) from your lungs. __2__. It increases circulation and improves the delivery of oxygen and nutrients to tissues throughout your body. __3__. It helps fight off colds, flu etc. by increasing the concentration of immunoglobulin A (免疫球蛋白A) in your saliva (唾液). And it may help control pain by raising the levels of certain brain chemicals.
Furthermore, it is a natural stress reliever. Have you ever laughter so hard that you doubled over, feel off your chair, spit out your food? __4__. The good news is that you are allowed more than 15 laughs a day! Go ahead and double the dose and make it 30 times today. (You may begin to notice immediate improvement in your relationships!) Then double it again! __5__. People will enjoy being around you as well.
Laughter, it's the best medicine.
A. Laughter is also good for your heart.
B. A good laugh helps you build up you body to protect against diseases.
C. However, it is confusing why laughter makes people so good.
D. However, are you aware of how much a good laugh can help you physically?
E. A good laugh relieves physical tension and stress.
F. You cannot maintain muscle tension when you are laughing!
G. You are likely to feel better and deal with problems more effectively.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Over the years, Americans have become used to salt．Most people have no idea how much salt they consume-on average, about 9 to 12 gram per person per day, according to the American Heart Association．That's twice the amount recommended by the government．
A new study last week showed eating even a little less salt could greatly help the heart．The scientists said the results would be thirteen percent fewer heart attacks, eight percent fewer strokes（中風(fēng)）, four percent fewer deaths and eleven percent fewer new cases of heart disease．
Researchers also found that the benefits would be greatest for African Americans and women．As a group, African Americans tend to have higher blood pressure than the general population, and "many studies suggest that they may be more sensitive to salt," says Dr.Kirsten Bibbins-Domingo, an epidemiologist（流行病學(xué)家）at the University of California, San Francisco．Her analysis found that a reduction of 3 gram of salt per day would reduce heart attacks 8% on average; among African Americans, that rate would drop 10%．A similar result was found in women, whose stroke risk dropped 8% with a 3-g reduction in salt intake; in men, the risk fell 5%．
They and public health professionals in the United States are interested in a national campaign to persuade people to eat less salt．
However, other scientists say such a campaign is an experiment with the health of millions of people．
Michael Alderman, a high blood pressure expert and professor at Albert Einstein College of Medicine in New York, says that eating less salt results in lower blood pressure．But he says studies have not clearly shown that lowering salt means fewer heart attacks or strokes．
“Salt has other biological effects． Calling for reductions in the national diet could have good effects, as well as harmful results． There is not enough evidence either way,”said Michael Alderman．
小題1:Eating too much salt may lead to the following EXCEPT           ．
A．strokeB．heart diseaseC．high blood pressure D．lung cancer
小題2:What can we learn from the passage?
A．Most Americans take more salt than advised．
B．African women eat more salt than Americans．
C．One's origin determines how much salt he can eat．
D．Good health is just on the basis of having less salt．
小題3:The author's attitude toward the study is         ．
A．coldB．objectiveC．subjectiveD．doubtful
小題4:What's the best title of the passage?
A．The Benefits of Eating Less Salt．
B．A New Study on Salt and Diseases．
C．An Argument Over Salt and Health．
D．The Harm Caused by Too Much Salt．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

I have been consistently opposed to feeding a baby regularly. As a doctor, mother and scientist in child development I believe there is nothing to recommend it, from the baby's point of view.
Mothers, doctors and nurse alike have no idea of where a baby's blood sugar level lies. All we know is that a low level is harmful to brain development and makes a baby easily annoyed. In this state, the baby is difficult to calm down and sleep is impossible. The baby asks for attention by crying and searching for food with its mouth.
It is not just unkind but also dangerous to say a four-hourly feeding schedule will make a baby satisfied. The first of the experts to advocate a strict clock-watching schedule was Dr Frederic Truby King who was against feeding in the night. I've never heard anything so ridiculous. Baby feeding shouldn't follow a timetable set by the mum. What is important is feeding a baby in the best way, though it may cause some inconvenience in the first few weeks.
Well, at last we have copper-bottomed research that supports demand feeding and points out the weaknesses of strictly timed feeding . The research finds out that babies who are fed on demand do better at school at age 5, 7 , 11 and 14, than babies fed according to the clock. By the age of 8, their IQ（智商）scores are four to five percent higher than babies fed by a rigid timetable. This research comes from Oxford and Essex University using a sample（樣本）of 10,419 children born in the early 1990s,taking account of parental education, family income, a child's sex and age, the mother's health and feeling style. These results don't surprise me. Feeling according to schedule runs the risk of harming the rapidly growing brain by taking no account of sinking blood sugar levels.
I hope this research will put an end to advocating strictly timed baby feeling practices.
小題1:What does the author think about Dr King?
A．He is strict
B．He is unkind
C．He has the wrong idea.
D．He sets a timetable for mothers
小題2:The word copper-bottomed in Paragraph 4 is closest in meaning to _________
A．basicB．reliableC．surprisingD．interesting
小題3:What does the research tell us about feeling a baby on demand?
A．The baby will sleep well.
B．The baby will have its brain harmed.
C．The baby will have a low blood sugar level.
D．The baby will grow to be wiser by the age of 8.
小題4:The author supports feeling the baby_______.
A．in the night
B．every four hours
C．whenever it wants food
D．a(chǎn)ccording to its blood sugar level

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

根據(jù)短文內(nèi)容，從下框A~F選項(xiàng)中選出能概括每段主題的最佳選項(xiàng)。選項(xiàng)中有一項(xiàng)為多余項(xiàng)。
A. A sense of humour is not an inborn ability.
B. A sense of humour can be developed in our life.
C. A sense of humour helps us from several aspects.
D. A sense of humour means more than telling jokes.
E. A sense of humour can be expressed in many ways.
F. A sense of humour helps people to better enjoy life.
小題1:As awareness of the benefits of humour increases, most of us want to get all the laughs we can. It seems that almost every day there is another new discovery about the power of humour to help us physically, mentally, emotionally, and spiritually. Every system of the body responds to laughter in some important or positive way.
小題2:Many people mistakenly believe that we are born with a sense of humour. They think that when it comes to a sense of humour. “Either you have got it or you don’t.” This is
false! What is true, however, is that the ability to laugh and smile is actually something we are born with. For example, we laugh when we are tickled under the arm, even without thinking about how to react.
小題3:The parts of the brain and central nervous system that control laughing and smiling are mature at birth in human infants, but that is not the same thing as having a sense of humour. (After all, when a baby laughs in his small bed we don’t rush over and say, “That kid has a great sense of humour!”) Your sense of humour is something you can develop over a lifetime. Don’t be nervous before others and try to laugh at yourself-then you will make them laugh too.
小題4:Humour includes a lot more than laughing and joke telling. Many people worry needlessly that they do not have a good sense of humour because they are not good joke tellers. More than jokes, a sense of humour requires being willing and able to see the funny side of life’s situations as they happen. In fact, one of the best definitions（定義）of a sense of humour is “the ability to see the nonserious element in a situation.”
小題5:There may be a thousand different ways to express your sense of humour, but joke telling is only one of those ways. As more is discovered about how humour benefits our life, more people will be able to see and enjoy the humour when they are in a difficult situation. Life depends on air, food and water, but it is made easier to live with a good sense of humour.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Drunk driving(醉駕) has become a serious problem in China. According to the Ministry of Public Security(公安部), the police caught more than half a million drunk drivers in 2010. On the night of May 9.2011. musician Gao Xiaosong ran his car into three other cars in Beijing because he drank too much wine. He was punished(懲罰) under China’s new drunk driving law that came into use on May 1.2011.
The new law sees drunk driving as a crime(犯罪). In the west, drunk driving is also a crime. In the US, for example, if the police catch a drunk driver, the driver will pay a fine, lose his or her license and even go to prison(監(jiān)獄). If the driver wants to drive again, he or she has to do public service, and take part in educational programs.
You may think: drunk driving is crime? Isn’t this law too unkind? But experts say: not at all. They think it is to protect people’s tights to life and health. Drunk driving is very dangerous!
小題1: Mr. Gao ran his car into three other cars because      .
A．he went home too lateB．he drank too much wine
C．the road was too crowdedD．he was sleepy
小題2: What does the underlined part “a fine” in the second paragraph refer to(指)？
A．HealthB．WeatherC．moneyD．wealth
小題3: When do experts think of the new law?
A．The law is to protect people’s rights to life and health
B．The law is not kind to drunk drivers
C．Driving has become a serious problem
D．Drunk driving is very dangerous
小題4:Which of the following sentence is TRUE?
A．Drunk driving isn’t dangerous
B．In the US, drunk drivers will lose their licenses
C．The police caught less than half a million drunk drivers in 2010
D．In China, drunk driving is not a crime
備注：1.文章最后一段的tights 應(yīng)改為rights, 2.第65小題中的when 應(yīng)改為what

查看答案和解析>>

同步練習(xí)冊(cè)答案