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科目: 來源:不詳 題型:閱讀理解


The sleep debt is the difference between the amount of sleep you should get and the amount you actually get. It grows every time we skim some extra minutes off our nightly sleep. “People accumulate sleep debts gradually,” says Dr. William Dement, founder of the Stanford University Sleep Clinic. Studies show that such short-term lack of sleep leads to a foggy brain, impaired vision, worsened driving and troubled remembering. Long- term effects include obesity, insulin(胰島素) resistance, and heart disease.
A 2007 survey by the National Sleep Foundation reports that Americans sleep for 6.9 hours per night, 6.8 hours on average during the week and 7.4 hours on the weekends. Generally, experts recommend eight hours of sleep per night, although some people may require only six hours of sleep while others need ten. That means on average, Americans lose one hour of sleep each night more than two full weeks of sleep every year.
The good news is that the sleep debt can be repaid with some work, though it won’t happen when you sleep longer for once. Adding an extra hour or two hours of sleep a night is the way to catch up. For the long-term sleep shortage, it takes a few months to get back to natural sleeping pattern, says Lawrence J. Epstein, medical director of the Harvard Sleep Health Center.
Go to bed when you are tired, allowing your body to wake you in the morning, with no alarm clock. You may find yourself uncomfortable at the beginning of the recovery cycle. Expect to bank to ten hours shut-eye per night. As the days pass, however, the amount of sleeping time will gradually decrease. For recovery sleep, both the hours of the sleep and the intensity(強(qiáng)度) of the sleep are important. The most refreshing sleep occurs during deep sleep, which is generally considered a restorative (促使健康的) period for the brain. And when you sleep for more hours, you allow your brain to spend more time relaxing.
As you reduce the sleep debt, your body will come to rest at a sleeping pattern that is specifically right for you. Sleep researcher believe that genes determine our individual sleeping patterns. So you can’t train yourself to be a “short sleeper”. A 2005 study in the journal Sleep found that the more tired we get, the less tired we feel.
46. Which of the following is NOT the side effect of sleep debt?
A. Putting on weight.  B. Having a bad memory. 
C. Having trouble eating food.  D. A temporary loss of eyesight.
47. We learn from the 2007 survey that _______.
A. Americans generally don’t have enough sleep
B. Americans sleep too much over the weekends
C. everyone is supposed to sleep for eight hours
D. most people lack two weeks of sleep every year
48. What should we do to make up for the sleep shortage?
A. We should go to sleep when we are free.
B. We should sleep for at least ten hours every day.
C. We should sleep for one or two more hours at night.
D. We should sleep day and night during the holidays.
49. Why is the intensity of the sleep important to us?
A. Our brain is resting when we are sleeping deeply.
B. Deep sleep helps our brain to fully recover.
C. We feel more relaxed when sleeping soundly.
D. Short sleep makes our body more refreshing.
50. The author seems to believe that _________.
A. the more tired we are getting, the more sleep we need 
B. the sleeping patterns have nothing to do with our genes
C. it is possible for us to reduce our sleep time by training
D. it is wise for us to adapt to our natural sleeping patterns.

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科目: 來源:不詳 題型:閱讀理解

A super drug that could remove Alzheimer’s (老年癡呆癥),heart disease and diabetes (糖尿病) and help people live to 100 is being developed by scientists. Their research is based on the identification of three genes that help prolong lives and prevent diseases which occur in old age. Medically controlling the proteins made by the “ longevity genes” will allow millions to live longer, predicts Dr Nir Barzilai.
Those whose DNA strongly features the three genes are 80 percent less likely to develop Alzheimer’s. The genes also fight against the deadly impact of smoking, poor diet, obesity and lack of exercise.
Already, several laboratories are working on a pill to imitate the benefits of the genes and Dr Barzilai thinks it could be tested within three years. The pill could remove some diseases that damage old age. “ The advantage of finding a gene that involves longevity is that we can develop a drug that will imitate exactly what this gene is doing,” he said.
Of the three longevity genes, two genes increase the production of so-called good cholesterol(膽固醇), which reduces the risk of heart disease. The third prevents diabetes. They were discovered by Dr Barzilai’s team while studying the DNA of 500 Ashkenazi Jews with an average age of 100. The chances of living that long are one in 10,000 but the group, which shared relatively few common ancestors, was 20 times more likely to hit the entury. Dr Barzilai said: “ 30 percent of them were obese or overweight and 30 percent smoked two acks of cigarettes a day for more than 40 years, however they can live to 100.”
But Andrew Ketteringham of the Alzheimer’s Society said: “Alzheimer’s disease, a most common disease, is likely to be caused by a combination of genetic disosition(遺傳傾向), lifestyles and life events. Many genes are probably involved.
小題1:Some people are able to live to 100 years because of ______.
A.a(chǎn) magical medicineB.three special genesC.good living habitsD.longevity proteins
小題2:Why does the discovery of the longevity genes mean a lot?
A.Because it can bring great benefits to scientific labs.
B.Because it can help people change their unhealthy genes
C.Because it helps produce a drug that can make people live longer.
D.Because it will help scientists build up a new branch of biology.
小題3: From Paragraph 4 we can infer that ________.
A.longevity genes can create good cholesterol.
B.the volunteers share some common ancestors
C.bad habits are likely to have no effect on the volunteers
D.longevity genes protect the volunteers against bad habits
小題4:What is Andrew Ketteringham’s attitude toward the study?
A.PositiveB.NegativeC.CriticalD.Cautious

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科目: 來源:不詳 題型:閱讀理解

Air travel is such an everyday experience these days that we are not surprised when we read about a politician having talks with the Japanese Prime Minister one day, attending a meeting in Australia the following morning and having to be off at midday to sign a trade agreement in Hong Kong. But frequent long-distance flying can be so tiring that the traveler begins to feel his brain is in one country, his digestion(消化吸收)in another and his powers of concentration nowhere---in short, he hardly knows where he is.
Air travel is so quick nowadays that we can leave London after breakfast and be in New York in eight hours, yet what really upsets us most is that when we arrive it is lunch time while we have already had lunch on the plane and are expecting dinner.
Doctors say that air travelers are in no condition to work after crossing a number of time zones. Airline pilots, however, often live by their own watches.
小題1:After a long air travel, a traveler _______.
A.finds himself in a different world
B.finds his brain apart from his body
C.finds himself in Hong Kong the following morning
D.has little sense about where he is
小題2:The sentence “Airline pilots often live by their own watches. ” means______.
A.they don’t trust others’ watches
B.they don’t change their watches
C.they make a living by their own watches
D.they do as they used to do
小題3:Doctors suggest the travelers_______?
A.should rest when they arrive in New York from London.
B.should work in good condition since they just finish a long journey.
C.rest in a place with good condition.
D.give up long journey since it makes them tired.

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科目: 來源:不詳 題型:閱讀理解

Bean and other seed shoots are also known as sprouts (新芽). The dry bean seeds contain a store of nutrients just waiting to be released when they sprout. Under the right conditions they will germinate (發(fā)芽)。 As they grow, the food value of the seeds is multiplied into vitamins, minerals (礦物質(zhì)) and other nutrients. This happens almost overnight!
It is easy to grow your own sprouts, but you need to buy your seeds from supermarkets or health food stores. Seeds for planting in the garden are often powdered with chemicals, so when becoming sprouts they are not safe to eat.
Try growing sprouts from a variety of beans and seeds. You will find different sprouts at different stages. Bean sprouts are best when they are about three centimeters long. Wheat and sunflower sprouts taste best when the sprouts and the seeds are of the same length. If the sunflower sprout is too long it leaves a funny stinging feeling in the throat after eating. Alfalfa sprouts are best when their small leaves are well developed. Pea and soybean sprouts are good long or short.
If you leave your sprouts in filtered sunlight for a few hours, the leaves will turn green as chlorophyll (葉綠素) is added. Eating sprouts with green leaves benefits your blood, cells, and the digestive system.
小題1:Which of the following sprouts taste good whether they are long or short?
A.Soybean sproutsB.Sunflower sprouts
C.Alfalfa sprouts D.Wheat sprouts
小題2:As sprouts grow, the food value of the seeds will_____.
A.increaseB.decreaseC.remain the sameD.lose
小題3:From the passage we know that______.
A.Long sunflower sprouts taste better than short ones
B.Eating too long sunflower sprouts will make you feel uncomfortable in the throat
C.Eating sprouts with green leaves will be harmful to your health
D.It takes a long time for the food value of the seeds to multiply
小題4:Which of the following is NOT true according to the passage?
A.Sprouts of seeds for planting in the garden may not be safe to eat.
B.Alfalfa sprouts taste best when their small leaves are more fully grown.
C.All sprouts taste best during the early stage of their growth.
D.Sunlight will make the leaves of sprouts green.

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科目: 來源:不詳 題型:完形填空

完形填空:閱讀下面短文,掌握其大意,然后從各題所給的四個選項中選出一個最佳答案。(共20小題,每小題1.5分)
In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be 46 .                    Today things are  47  , the world has become too  48  . We are using up our natural resources too quickly, and at the same time we are  49  our environment with dangerous chemicals. If we continue to do this, human life on the earth  50  survive.
  Everyone 51  today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing  52 , more and more fish are caught. We know that if too many trees are cut down,  53  will disappear and nothing will grow on the land. Yet, we  54  to use bigger and more powerful machines to 55  more and more trees.
  We realize that if rivers are polluted with waste products from factories, we will die.  56  , in most countries wastes are  57 put into rivers or into the sea, and there are  58  laws to stop this. We know, too, that if the  59 of the world continues to rise at the present rate, in a few years there will not be enough 60 . What can we do to solve these problems ?
   If  we eat more vegetables and less  61  , there will be more food available for everyone. Land that is used to grow crops  62  five times more people than land where animals are kept. Our natural resources will  63  longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth 64  .
  Finally, if we educate people to think about the problems, we shall have a better and clearer 65 in the future.
小題1:
A.beautifulB.unlimitedC.rareD.valuable
小題2:
A.commonB.the sameC.changeable D.different
小題3:
A.crowdedB.smallC.dirtyD.busy
小題4:
A.protectingB.savingC.pollutingD.fighting
小題5:
A.may notB.will notC.shall notD.could not
小題6:
A.wondersB.realizesC.considerD.discovers
小題7:
A.polesB.boatsC.methodsD.ideas
小題8:A  mountains     B. the sea                 C. trees                 D. forests
小題9:
A.continueB.haveC.oughtD.go on
小題10:
A.growB.plantC.saveD.cut down
小題11:
A.Thus B.However
C.Generally speaking D.Therefore
小題12:
A.stillB.evenC.a(chǎn)lsoD.certainly
小題13:
A.too manyB.a(chǎn) fewC.someD.few
小題14:
A.productionB.pollutionC.populationD.revolution
小題15:
A.housesB.vegetablesC.foodD.lives
小題16:
A.fruitB.meatC.fishD.grain
小題17:
A.feedsB.increasesC.suppliesD.helps
小題18:
A.useB.stayC.keepD.last
小題19:
A.controlB.bornC.planD.reward
小題20:
A.natureB.seaC.planetD.forest

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科目: 來源:不詳 題型:閱讀理解

I know what you’re thinking : pizza? For breakfast? But the truth is that you can have last night’s leftovers in the a. m. if you want to.
I know lots of women who skip breakfast , and they have a ton of different excuses for doing it . Some say they don’t have time. others think they’re “saving” calories, still others just don’t like breakfast food . 
But the bottom line is that 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,” says Katherine Brooking , R , D , who developed the super-easy eating plan for this year’s “SELF CHALLENGE”. And even pizza can be healthy if it’s loaded with vegetables, and you stick to one small piece. 
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 at the University of Southem California found that breakfast skippers 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.things left undoneB.food remaining after a meal
C.meals made of vegetablesD.pizza topped with fruit
小題2:What can we infer from the text?
A.Working women usually have breakfast in a hurry.
B.There are some easy ways of cooking a meal.
C.Many people have wrong ideas about breakfast.
D.Eating vegetables helps save energy.
小題3:According to the last paragraph, it is important to____________. 
A.eat something for breakfastB.put away the leftovers instead of eating more.
C.heat up leftovers for breakfastD.eat calorie-controlled food
小題4:The text is written mainly for those_____________. 
A.who go to work earlyB.who stay up late
C.who want to lose weightD.who eat before sleep

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科目: 來源:不詳 題型:閱讀理解

American society is not nap (午睡)friendly . In fact , says David Dings , sleep specialist at the University of Pennsylvania School of Medicine , “There’s even a prohibition (禁止) against admitting we need sleep”. Nobody wants to be caught napping or found asleep at work . To quote a proverb : “Some sleep five hours , nature requires seven , laziness nine and wickedness(淘氣的) eleven.”
The way not to fall asleep at work is to take naps when you need them . “We have to totally change our attitude toward napping ,” says Dr. William Dement of Stanford University , the godfather of sleep research .
Last year a national commission led by Dement identified(發(fā)現(xiàn)) an “American sleep debt” which one member said was as important as the national debt . The commission was concerned about the dangers of sleepiness : people causing industrial accidents or falling asleep while driving . This may be why we have a new sleep policy in the White House . According to recent reports , President Clinton is trying to take a half---hour snooze (瞌睡) every afternoon .
About 60 percent of American adults nap when given the opportunity . We seem to have “a mid afternoon quiet phase ,” also called “a secondary sleep gate .” Sleeping 15 minutes to two hours in the early afternoon can reduce stress and make us refreshed . Clearly , we were born to nap .
We superstars of snooze don’t nap to replace lost shut--eye or to prepare for a night shift . Rather , we “snack” on sleep ,whenever , wherever and at whatever time we feel like it . I myself have napped in buses , cars , planes and on boats ; on floors and beds ;and in libraries ,  offices and museums .
小題1:The research done by the Dement Commission shows that Americans     .
A.don’t like to take naps
B.a(chǎn)re terribly worried about their national debt
C.think that lack of enough sleep causes many accidents
D.have caused many industrial and traffic accidents
小題2:The purpose of this article is to     .
  1. warn us of the wickedness of napping 
B. explain the danger of sleepiness
C. discuss the side effects of napping
D. convince the reader of the necessity of napping
小題3:The “American sleep debt”(Line 1 , Para .3) is the result of      .
  1. the traditional misconception the Americans have about sleep
  2. the new sleep policy of the Clinton Administration
  3. the rapid development of American industry
  4. the Americans’ worry about the danger of sleepiness
小題4:The second sentence of the last paragraph tells us that it is      .
  1. preferable to have a sound sleep before a night shift
  2. good practice to eat something light before we go to bed
  3. essential (基本的) to make up for lost sleep
  4. natural to take a nap whenever we feel the need for it

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科目: 來源:不詳 題型:閱讀理解

American farmers are raising five percent more goats for meat these days.
Goat meat is high in protein(蛋白質(zhì))and lower in unhealthy fat than many other meats.Even so,the industry is small compared to chicken,beef and pork. But immigration has brought more of a taste for goat to America from all over the world.
Experts from the University of Illinois offer some questions for people to consider if they are thinking about raising goats.
First of all,do you understand that there always has to be someone to care for the goats?
◆How much land do you have available? And how good is it? Poor ground may support two to four goats on half a hectare.Better grassland can support six to eight. If goats and cattle share the land,two goats can be added for each cow. The goats will eat weeds and other plants that cattle do not like.
◆Do you have buildings for the number of female goats you plan to keep during winter? An open,cold,dry barn is better than a closed,warm barn where the air is wet.
◆Do you have the equipment to clean barns(畜棚) and to harvest hay(草料) to feed your goats? Or will you get someone else to do it,or buy the hay?
The experts say a profitable business in goat meat may take three to five years to establish.And, of course, there are no guarantees .
小題1:On which section of a newspaper will this passage appear?
A.International AffairsB.Entertainment
C.AgricultureD.Culture
小題2:Which of the following is NOT a factor in making goat meat more popular?
A.Goat meat is healthy food.
B.Immigrants bring different tastes.
C.The industry still leaves room for profit.
D.Raising goats is challenging.
小題3:If someone has two hectares of good grass land, what is the maximum number of cows and goats he can raise?
A.32 cows and 64 goats.B.32 cows and 32 goats.
C.16 cows and 32 goats.D.8 cows and 16 goats.
小題4: What is the experts’ opinion about the goat-raising business?
A.You can make sure money.
B.You had better be cautious and patient.
C.Goats are hardly possible to raise.
D.Goat meat still needs to be recognized.

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科目: 來源:不詳 題型:閱讀理解

There is a joke among flu researchers: “If you've seen one flu season, you've seen one flu season.” The joke is about the unpredictable nature of the flu virus. Every year it looks different, and every strain (類型) follows its own pattern — it's the reason why new strains like H1N1 are extremely difficult to predict.
Dr. Michael Osterholm is a former adviser to the U.S. Department of Health and Human Services. “I know less about influenza today than I did 10 years ago,” he says in a joking way. “Every stone we've turned over, we get more questions.”
The flu rectums every season and the world experiences terrible pandemics (全國或全世界范圍流行的疾病), but researchers still do not understand why some strains infect people and others do not; they are not entirely sure about how the flu is transmitted; nor do they understand why some patients become seriously ill while others develop mild symptoms (癥狀). As a result, when a new strain shows up — like H1N1 — they often have little information to fall back on, and the lessons of previous pandemics are only somewhat helpful. While researchers are still putting together a complete picture of H1N1, for example, its most striking difference with the seasonal flu is that the elder1y are not the most vulnerable (易受攻擊的) population.
Influenza's unpredictable nature makes it a moving target for researchers, says researcher Allison Aiello at the University of Michigan. “Even if we had complete seasonal flu data from the past, it wouldn't be much helpful for a new strain of influenza,” she explains.
Whi1e researchers are frustrated by the holes in their knowledge, they say, however, that the pub1ic--health community is generally doing a very good job responding to H1N1 with seasonal flu data that do exist. Studying influenza, says Osterholm, is “l(fā)ike looking through the windows of a house you can't get into because the door is locked.” Gathering the data researchers do have is like “l(fā)ooking through the windows to get a pretty good picture of what the inside looks like.”
One thing researchers do know for sure: the best way for people to protect against H1N1 is to get the vaccine once it becomes available to them.
小題1:What do we learn about H1N1 from the passage?
A.In fact it is not a kind of influenza virus.
B.It is quite possible to predict it in theory.
C.Old people are more likely to contract it than kids.
D.Receiving vaccines will be effective to protect against it.
小題2: The underlined phrase “fall back on” in Para. 3 probably means      .
A.rely onB.pass onC.col1ect D.exchange
小題3: What do we know about previous seasonal flu data?
A.It is useless to study them.
B.It is still necessary to study them.
C.They are misleading most of the time.
D.They are much more helpful than expected.
小題4:Which of the following could be the best title for the passage?
A.Outbreaks of the fluB.Symptoms of the flu
C.Mysteries of the fluD.Risks of the flu

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科目: 來源:不詳 題型:閱讀理解

SHANGHAI - Health experts in Shanghai are calling for more protection for young children as the latest research shows about half of the youngsters are suffering from secondhand smoke.
About 45 percent of children suffer passive smoking in families, 50 percent in public places, and almost 6 percent on public transportation, shows a research released by the Shanghai Children's Medical Center on Tuesday.
"Not only adults but also children and newborn babies are at risk for the adverse effects of passive smoking," said Tang Jingyan, a doctor at the Shanghai Children's Medical Center.
"Actually, those young children whose bodies are still growing and developing are more sensitive to the effects of secondhand smoke."
Research has shown that children who are exposed to secondhand smoke will suffer from more colds, coughs and sore throats, and they are more likely to suffer from bronchitis, pneumonia and will have a higher risk of developing cancer.
Doctors even suggested that children suffering passive smoking are more likely to have behavioral problems and may not develop mentally as quickly as their peers.
Other research by the Shanghai Children's Medical Center has found that more than 80 percent of child patients in the center live in a smoke-filled household, where one or both parents smoke.
"Though doctors have stressed the harm of passive smoking over and over, it is still hard to reach a totally 'smoke free' home," said a pediatrician named Zhang Yiwen, noting that parents are often tempted to smoke even though they have learned the harmful effects of secondhand smoke.
China has 540 million people suffering from passive smoke, 180 million of them younger than 15.The age of smokers is also getting lower, earlier reports said.
"There are more young smokers than before.You can see young people wearing a school uniform and carrying a schoolbag light a cigarette on the street.Some of them are even female students," said Jing Xingming, a professor of children's developmental behavior at the center.
"Children like to imitate adults, especially their parents.If parents often smoke at home, it is very likely children will develop a smoking habit, which can cause a vicious circle," Jin said.
Reports from the Ministry of Health said China has about 350 million smokers, of whom 15 million are underage smokers.Also, around 40 million of the country's 130 million children aged between 13 and 18 had tried smoking, and 15 million had become addicted to tobacco.
小題1:What is the main idea of the passage?
A.About half of the youngsters are suffering from secondhand smoke.
B.Experts are calling for more protection for youngsters from smoking.
C.More and more youngsters are picking up the habit of smoking.
D.Smoking does great harm to the health of the youngsters.
小題2:What kind of the youngsters most possibly develop a habit of smoking?
A.Children of non-smoking mothers.B.Children of non-smoking fathers.
C.Children of heavy smokers.D.Children from some smoking centers.
小題3:Which of the following disease may not be connected with secondhand smoking?
A.Cancer.B.Behavioral problems.C.Sore throats.D.Coughs.
小題4:The underlined word “vicious” in the last paragraph but one most probably means ___________.
A.completeB.simpleC.greatD.bad
小題5:What can be inferred from the passage?
A.About 80% of the children in the Shanghai Children's Medical Center smoke heavily.
B.About 45 percent of children suffer passive smoking in the Shanghai Children's Medical Center.
C.About 540 million people are heavy smokers in China.
D.Children aged between 13 to 18 are more likely addicted to smoking.

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