Scientists say they now have proof to support the old-fashioned advice that it's best to sleep on a problem. They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day.
Lead researcher Bob Stickgold at the Harvard Medical School said, "Sleep helps us draw rules from our experiences. It's like knowing the difference between dogs and cats even if it's hard to explain."
The US research team studied how well students remembered connections between words and symbols (象征) , reports New Scientist. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night's sleep than after the same time spent awake during the day. They also found it easier to remember themes (主題) that the words had in common. But they forgot around one in four more themes if they had been awake. Prof. John Groeger, of Surrey University's Sleep Research Centre, said, "People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative (有助恢復的) value. " "We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all."
小題1:The phrase" to sleep on a problem" in Paragraph 1 most likely means to______.
A．pay full attention to a problemB．wait until later for a decision
C．sleep to forget a problemD．have difficulty sleeping
小題2:In the study by the US research team, students were asked to______.
A．put together words of similar meanings
B．remember words and their meanings
C．show their knowledge of words
D．make up lists of related words
小題3:Which of the following may be easier to remember?
A．Themes learned right before the test
B．Rules from personal experience
C．Words learnt before a good sleep
D．Ideas stored together in the brain
小題4:What may be the importance of the research?
A．It shows sleep may help us manage information
B．It helps find out the common themes of word
C．It tells us that more sleep can improve health
D．It proves the value of old-fashioned advice

小題1:B
小題2:B
小題3:C
小題4:A

試題分析： 本文講述的睡眠對人的記憶的影響，在睡覺之前背誦的東西，醒了以后更加容易被記得。
小題1:.B 推理題。根據(jù)本句Scientists say they now have proof to support the old-fashioned advice that it's best to sleep on a problem.是指帶著問題入睡，也就是指暫時無法解決問題，或者記不住，或想不起來。要等到醒了以后再說。故B項符合上下文。
小題2:B 推理題。根據(jù)第3段2,3,4行. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night's sleep than after the same time spent awake during the day可知這個研究主要是針對單詞和象征之間的聯(lián)系。研究學生在睡著以后，再醒來和一直醒著。哪一種記憶的效果更好。故B正確。
小題3:C 細節(jié)題。根據(jù)第三段4,5行They found that people were better able to remember lists of related words after a night's sleep than after the same time spent awake during the day.可知在睡覺之前背誦的單詞更容易被記住。故C正確。
小題4:A 推理題。根據(jù)文章最后4行"People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative (有助恢復的) value. " "We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all."可知睡眠可以幫助我們管理好信息，幫助我們記憶。故A正確。
練習冊系列答案
相關(guān)習題

科目：高中英語 來源：不詳 題型：閱讀理解

WELLINGTON, September 19 (Xinhua) -- If your teenage son won't get out of bed in the morning, then take comfort from the fact that he might be sleeping his way to a healthier future, according to a new research from New Zealand.
Researchers in human nutrition at the University of Otago have found that teenage boys who sleep less have more body fat when compared to girls, for whom lack of sleep has no noticeable effect on their body fat ratios.
The study of 386 boys and 299 girls aged 15 to 18 found that average-sized 16-year-old boy weighing 69.5 kg and 176 cm tall, who slept for eight hours a day, had a waist size l.8 cm bigger and l.6 kg, or 9 percent, more body fat than the average-sized boy who slept 10 hours a day.
"The boys who slept eight hours a day would also have l.8 kg more lean (bone and muscle) mass compared to the boys who slept 10 hours, but that's only a 1.4-percent increase, compared to the 9- percent increase seen in body fat," said lead researcher from the Department of Human Nutrition, Dr. Paula Skidmore.
"Our results suggest that for older teenage boys, making sure that they get enough sleep may help to maintain a healthier body. It seems to be that, within reason, the more sleep the better for boys," Skidmore said in a statement Thursday.
"It was unexpected that we did not find the same result in girls, who may actually be more aware of their diet and more in tune with a healthier lifestyle."
The researchers ruled out the effects of food choice and number of screens, such as televisions, games and consoles, which the teenagers had in their bedrooms.
小題1:What's the research really about?
A．Boys and girls.B．Food and weight. C．Sleep and health. D．Screens and fat.
小題2:What's the result of less sleep for teenage boys?
A．Bigger waist and more fat in the body.
B．An increase in weight and height.
C．More concerned with their diet.
D．A decrease in bone and muscle.
小題3:From the sixth paragraph we can infer that ______.
A．girls usually sleep less and have healthier lifestyles than boys
B．the researchers expected to see the same result in girls
C．peoples' diet has a great effect on their health
D．boys are usually lazier than girls
小題4:Who would be the most pleased to hear the news?
A．Teachers.B．Girls.C．Parents. .D．Boys.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Read the following text and choose the most suitable heading from A—F for each paragraph. There is one extra heading which you do not need.
A. When a child should learn to read
B. Why it is fun to teach a child reading
C. What if a child has reading problems
D. How you prepare a young child for reading
E. What is the best way to teach a child reading
F. Whether reading early promises later achievements
小題1:                  
Learning to read early has become one of those indicators—in parents' minds at least—that their child is smart. In fact, reading early has very little to do with whether a child is successful academically. Research has shown that difficulty with reading is often due not to inferior intelligence but to differences in the developmental wiring of each individual child. In some cases, there are neurological problems and developmental lags that can be overcome with proper training.
小題2:               
Traditionally, American schools teach children at age six, but many schools begin teaching informally in kindergarten and pre-kindergarten. If parents start too early to encourage reading, and a child does not immediately succeed, the parent has a hard time relaxing and letting the child go at his or her own pace.
小題3:               
Over the years, research has proved that the use of both the “whole language” method and the “phonic” method works best for a child to master reading. While the whole language approach, which includes reading to children and getting them interested in both the activity of reading and the story they are reading, is helpful, phonics must be taught. Children must be taught that one of the squiggles they see is a “p” and another a “b”. Getting the print off the page requires a different ability than being able to understand the meaning of what is written.
小題4:               
You can start developing the skills needed in reading at a very young age without putting any pressure on children. Besides reading to them, parents can start “ear training” their child by playing rhyme games. This develops the child's ability to recognize different sounds. In reading to children, parents also can point to words as they go, teaching the child that the funny lines on the page are the words you are saying. All this should be a fun activity.
小題5:               
Once a child is in school, the learning of reading is inevitably more serious. For children who have some kind of reading difficulty, you must get a professional diagnosis. While the teacher might say the child is merely disinterested but will get over it, disinterest or poor performance in reading can stem from a number of things, some being very specific learning disabilities that can be identified and worked on. But it is very tricky for parents to deal with their own child's learning disabilities.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

The name sounds funny but the idea is no joke: it’s a personal toilet called the pee-pool, Anders Wilhelmson, a Swedish architect, is the inventor of the pee-pool.
He became interested in the idea of sanitation(衛(wèi)生設(shè)施) after taking part in a research project on the social and political development of cities, One of the most common problems he found in developing countries was the lack of toilets, He wanted to do something to help, So working with others, he started the project in 2005, and the next year started a company called Peepoolple.
The toilet is a single—use bag made of environmentally friendly plastics, The inside is treated with urea （尿素）, a chemical commonly used as fertilizer, The hotter the weather, the more quickly the waste turns into what is needed by plants The sanitation process can be as soon as a couple of hours or as long as two to four weeks ,You can just bury it in a pot and grow whatever you like.
The company expects to start selling the bags in August in Kenya and Bangladesh, But it is just beginning production and sales in Nairobi now , Full production could reach about half a million bags a day and people may be able to buy the pee-pool in countries Vietnam, Bangladesh, etc.
The United Nations says more than two and a half billion people around the world do not have good sanitation ,Many have no choice but to use the outdoors, which is not only bad for the environment ,but also harmful to people’s health, Each year, poor sanitation leads to three fifths of those people getting an infectious disease which on average causes one out of 1,000 patients to die.
Jack Smith ,the founder of the World Toilet Organization ,says “This is quite an unacceptable situation given the fact that we are living in the modem world , And strangely, many of them own televisions ,phones but have no toilet.”
小題1:What was the original purpose of Anders Wilhelmson in starting the company?
A．To protect the local environment
B．To earn a lot of money from the project
C．To do research on the social development
D．To help solve the problem of lack of toilets in developing countries
小題2:What can be learned about the pee-pool from the passage?
A．It can be used over again
B．Its sanitation process doesn’t last long
C．It works better in summer than in winter
D．It should be buried in a pot after being used
小題3:In which place can people buy the Pee-pool now?
A．NairobiB．VietnamC．SwedenD．Bangladesh
小題4:The fifth paragraph is written mainly to tell us that       
A．poor sanitation may cause many problems
B．many people don’t care for the environment
C．many people get ill from using the outdoors
D．quite a number of people died from poor sanitation
小題5:The underlined word“This ”in the last paragraph probably refers to         
A．the outdoors being damaged
B．many places being shout of toilets
C．many people having TVs and phones
D．many people getting an infection disease

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解



At East China University of Science and Technology, students will get a coupon（優(yōu)惠券）if they eat up their food. Students can collect coupons and exchange them for small gifts, such as books, magazines, mobile phone covers and hand warmers.
“It’s been such a surprise,” said Liang Zhaoyun, 19, a student at the university in Shanghai. “It has given us one more motivation to finish our food.”
The measure （措施） is part of a national “eat-up” campaign（行動） which is organized by students to deal with food waste on campuses（校園）.
Why only on campuses, you might ask? Because according to a report by Xinhna News Agency, students waste twice as much food as the national average（平均）.
The campaign on campus food waste is receiving attention across the country.
“The aim of the campaign is not only to encourage students to finish their food. We hope it can also encourage students to choose a more environment-friendly and healthy lifestyle,” said Tao Siliang, secretary of the Youth League Committee at Shanghai University.
But some school food is poorly prepared, so students do not like to finish it all. Some schools have taken notice of this and they are taking measures to improve it.
“I’m glad that we’ve reduced food waste since the ‘eat-up’ campaign began. But if we call on students to waste less food, we should also improve the service and food standard on campuses.” said Tao.
小題1:From Paragraph l, we know that the students will get a coupon __________.
A．when they eat school foodB．a(chǎn)fter they exchange gifts
C．if they collect the wasteD．if they finish all their food
小題2:The underlined word “motivation” in Paragraph 2 means __________ in Chinese.
A．動力B．機會C．試驗D．條件
小題3:The “eat-up” campaign is carried out on campuses because __________.
A．students get a good education
B．schools offer small gifts
C．students waste too much food
D．school food is more delicious
小題4:The purpose of the campaign is mainly to __________.
A．improve the school food standard
B．encourage a greener and healthier lifestyle
C．receive attention from the society
D．further improve the service in universities
小題5: The best title for this passage may be __________.
A．Enjoy Your Food!B．Reduce Waste on Campus
C．Meals in Universities.D．“Eat-up” Campaign on Campus

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Do you know that women’s brains are smaller than men’s? The average women’s brain weighs 10% less than men’s. Since researches have shown that the bigger the brain, the cleverer the animal, men must be more intelligent than women. Right? Wrong. Men and women always score similarly on intelligence tests, despite the difference in brain size. Why? After years of study, researchers have concluded that it’s what’s inside that matters, not just the size of the brain. The brain consists of “grey matter” and “white matter”. While men have more of the latter, the amount of “thinking” brain is almost exactly the same in both sexes.
It has been suggested that smaller brain appears to work faster, perhaps because the two sides of the brain are better connected in women. This means that little girls tend to learn to speak earlier, and that women can understand sorts of information from different sources at the same time. When it comes to talking to the boss on the phone, cooking dinner and keeping an eye on the baby all at the same time, it’s women who come out on top every time.
There are other important differences between two sexes. As white matter is the key to spatial(空間的) tasks, men know better where things are in relation to other things. “A great footballer always knows where he is in relation to the other players, and he knows where to go,” says one researcher. That may explain one of life’s great mysteries—why men refuse to ask for directions … and women often need to!
The differences begin when fetuses(胎兒) are about nine weeks old, which can be seen in the action of children as young as one. A boy would try to climb a barrier (障礙物) before him or push it down while a girl would attract help from others. These brain differences also explain the fact that more men take up jobs that require good spatial skills, while more women speech skills. It may all go back to our ancestors, among whom women needed speech skills to take care of their babies and men needed spatial skills to hunt, according to one research. www. .com
If all this disappoints you, it shouldn’t. “The brain changes throughout our lives according to what we do with it.” says a biologist.
小題1:Which of the following is true according to the first paragraph?
A．Women’s brain is 10% less than men’s
B．Grey matter plays the same role as white matter.
C．Grey matter controls thinking in the brain.
D．Both sexes have the same amount of white matter.
小題2:What can we infer from the second and third paragraphs?
A．Women prefer doing many things at a time.
B．Men do better dealing with one job at a time.
C．Women do not need to tell directions.
D．Men have weaker spatial abilities.
小題3:Which of the following do you agree with according to the fourth paragraph?
A．Young boys may be stronger than young girls.
B．More women take up jobs requiring speech skills.
C．Women may have stronger feelings than men.
D．Our ancestors needed more spatial skills.
小題4:What is the writer’s attitude in writing this passage?
A．Defensive.B．Persuasive.C．Supportive.D．Objective.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Gray hair is simply a part of the normal aging process, and the rate you go silver is genetically predetermined. Going gray is not associated with earlier death, and premature graying is not, generally speaking, a sign of an illness or ill health in younger adults. There are, however, some specific health conditions associated with gray or white hair, but for most of us, going gray is just a fact of life.
Hair color comes from the pigment melanin(黑色素), which determines your individual shade. Hair without any melanin is pure white. The pigment is produced in cells called melanocytes, which inject pigment into the hair. At some point in everyone's lifetime, these cells slow down and eventually stop producing color. Scientists have yet to identify the exact mechanism by which melanocyte cell death occurs.
A study of more than 4,000 women and men from 20 countries determined that about 75% of people between the ages of 45 and 65 have some gray hair. In general, people of European descent gray earliest followed by Asians and Africans. It's interesting to note that a lucky 1 in 10 has no gray hair by retirement age. Beginning at age 30, your chances of having gray hair go up 10-20% per decade.
It may feel like you have more grays after a stressful event, but that's probably because middle age is basically a series of anxiety-ridden events. Between working, raising kids, and caring for older parents, the "sandwich" years of 45-65 can be stressful, especially for women. They are also when we naturally start to look older.
At this point, there is still no silver bullet to keep away the grays.
小題1:What would be the best title for this passage?
A．Going gray.B．Tips to make hair color last
C．Why does hair turn gray?D．Gray hair is in fashion.
小題2:Which of the following is a true statement according to the passage?
A．Scientists have found out how to prevent hair from turning gray.
B．Europeans are more likely to gray than Asians and Africans.
C．Gray hair means poor health or a sign of illness.
D．Everyone will inevitably get gray hair by retirement age.
小題3:Which is not among the reasons for hair turning gray according to the passage?
A．Being physically weak.B．Stress from different sides.
C．Death of melanocyte cell.D．Genetic factors.
小題4:What does “silver bullet” in the last paragraph probably mean?
A．Make-upB．Scientific research.C．Chemical weapon.D．Cure.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

All around the world, shoppers flock to Wal-Mart to buy everything．In Texas, they come for another reason: to see the wind turbine(渦輪機) , which supplies 5% of the store's electricity．It along with other facilities, such as exterior walls coated with heat-reflective paint, makes this Wal-Mart a green giant．
The laws of economics suggest that Wal-Mart, with 5, 200 stores worldwide, influences everything including the price of all kinds of goods．It throws its weight behind environmental responsibility, and the impact could be amazing．"One little change in product packaging could  save 1, 500 trees," says Wal-Mart CEO Lee Scott．"If everybody saves 1, 500 trees or 50 barrels of oil, at the end of the day you have made a huge difference．"
Scott wants Wal-Mart to do its part too．He has promised to cut the existing greenhouse-gas emissions （排放） over the next few years and promised to construct new stores that are more efficient．He wants Wal-Mart's fleet (車隊) of more than 7, 000 trucks to get twice as many miles per gallon by 2015．Factories that show Wal-Mart they're cutting air pollution will get preferential treatment in the supply chain. Wal-Mart says it's working with consumer-product manufacturers to  reduce their packaging and will reward them if they do so．
Some people may doubt it is a bid to attract attention from Wal-Mart's controversial labor and health-insurance practices．But it's not just window dressing, because Wal-Mart sees profits in going green．Scott says, "This is a business philosophy, not a social philosophy．We don't go where we don't think there's a great interest in change．"
Like Bill Gates, who started his charitable foundation, Scott happens to be promoting Wal-Mart's image at a time when his company's reputation is declining．He acknowledges that he launched the plan partly to shield （保護，庇護） Wal-Mart from bad press about its contribution to global warming．" By doing what we're doing today, we avoid the headline risks that are going to come for people who did not do anything," he says．"At some point businesses will be held responsible for the actions they take．" Meanwhile, should Wal-Mart succeed at shrinking its environmental footprint and lowering prices for green products, both the planet and the company will profit．
小題1:We can infer from the passage that ______．
A．Lee Scott is Wal-Mart's CEO
B．there are 5, 200 stores in the world
C．Wal-Mart has a great influence on the world market
D．Wal-Mart has more than 7, 000 trucks all over the world
小題2:What does the underlined sentence "This is a business philosophy, not a social philosophy．" mean in the fourth paragraph?
A．Wal-Mart predicts huge profits in its green activity．
B．Wal-Mart's green activity is just window dressing．
C．Wal-Mart aims to solve its health-insurance practices．
D．Wal-Mart doesn't have any social responsibility at all．
小題3:What will Wal-Mart probably do in the future?
A．Reduce air pollution in its present stores．
B．Give favorable treatment to its consumers．
C．Ask the factories to reduce their packaging．
D．Demand the fleet of trucks to use more fuel than before．
小題4:What is the main idea of the last paragraph?
A．Provide the background of the green plan．
B．Stress the purpose of Wal-Mart's green plan．
C．Present the risk that Wal-Mart is facing nowadays．
D．Analyze the similarity between Bill Gates and Scott.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Plastic is everywhere because plastic is an extremely useful material. It is cheap, strong and lightweight. What’s more, it can take on nearly any form or shape, from soft and stretchy (有彈性的) to hard and glasslike.
Plastic, however, is far from perfect. It may even be bad for us. Studies now suggest that poisonous chemicals can get out of some types of plastic, get into our bodies, and cause a variety of health problems, including cancer, birth defects and attention deficit hyperactivity disorder (注意缺陷障礙).
Two types of chemicals in particular have raised special concern lately. They are called phthalates (鄰苯二甲酸鹽) and Bisphenol-A (二酚基丙烷), BPA for short. Not all plastic products contain them. But the ones that do are surrounded by controversy (爭議). That’s because experts disagree on how dangerous these chemicals are.
Plastic is a single word, but plastic isn’t just one thing. What all plastics share in common are plasticizers -- special chemicals that allow the material to be changed into nearly any shape or texture. Plasticizers (塑化劑) are added to plastic during the manufacturing process.
Phthalates and BPA are two types of plasticizers that work in different ways. Phthalates add softness to things like shampoo bottles, raincoats and rubber. They are also used in perfumes and makeup. BPA, on the other hand, gives a hard, clear, almost glasslike feel to products such as infant bottles. BPA also appears in food and soda cans, DVDs and other unexpected places.
How do these chemicals get into us? When plastic is heated in the microwave or dishwasher, chewed on or scratched, the chemicals can seep (滲透) out of the plastic. Even though we can’t see them, we eat them, drink them and breathe them in.
Scientists and parents are especially worried about young children, who tend to chew on everything, including plastic. Dozens of countries, including the European Union, Japan, Canada and Mexico have already banned phthalates from products made for children younger than three. California and Washington have done the same. And a number of other states are considering similar rules. As for BPA, Canada became the first country to ban the chemical from baby bottles. A dozen states are considering it.
小題1:What can we know about the plastic from the first paragraph?
A．Its characters and effects.B．Its wide use and bad points.
C．Its importance and chemicals.D．Its popularity and advantages.
小題2:Which of the following products contains BPA?
A．A soft plastic cup.B．A pencil eraser.
C．A baby milk bottle.D．A new perfume.
小題3:Phthalates and BPA can get into us __________.
A．through mouth or noseB．through blood transfusion
C．by feeling plastic productsD．by heating in the microwave
小題4: What is the passage mainly about?
A．A new ban on plastic products.B．Problems caused by the plastic.
C．Good points of the plastic.D．The use of plasticizers.

查看答案和解析>>

同步練習冊答案