填空题 A Star Is Born 1. The VLT(Very Large Telescope)is the world's largest telescope (望远镜) and is taking astronomers (天文学家) further back to the Big Bang than they ever thought possible. Located 2,600 metres up to the Chilean Andes, it has four huge mirrors, each about the size of a London bus. The VLT is so powerful it can spot a burning match 10,000 kilometres away. 2. This astonishing power will allow astronomers to see events in space from the birth of stars to the collision (碰撞) of galaxies (星系) on the edge of the cosmos (宇宙). The VLT is giving astronomers their best-ever view of the cosmos. The power of the VLT to see the smallest detail at the furthest distances makes its designers amazed. 3. Take the case of Eta Carinae, one of the most explosive stars in the universe. This star produces ultraviolet laser rays (紫外线) and it will destroy itself in a few million years' time. It is five times brighter than the sun and when it explodes it is going to be a sight worth waiting for! 4. But it is at distances of millions, even billions, of light years that the VLT really shows its power. The VLT can detect light that set out on its journey before the earth even existed. This gives astronomers their first—ever detailed views of events that took place in the earliest days of the cosmos. 5. In other words, the VLT is a kind of a time machine. It takes astronomers back to a time when complete galaxies crashed into each other. The effects of these past collisions can now be seen by scientists, and astronomers believe the telescope will reveal more about these exciting events in the years to come. One day, we might be able to say we have traveled back to the beginning of time, and we will have a much clearer picture of how our planet was born.

填空题Little Lady Starts Big War Harriet Beecher Stowe had poured her heart into her anti-slavery book "Uncle Tom"s Cabin". 1 The publisher was so doubtful that he wanted her to split the publishing costs with him, and all she hoped was that it would make enough money for her to buy a new silk dress. But when the first 5,000 copies were printed in 1852, they sold out in two days. In a year the book had sold 300,000 copies in the United States and 150,000 in England. 2 Within six months of its release, a play was made from the book which ran 350 performances in New York and remained America"s most popular play for 80 years. It might appear that "Uncle Tom"s Cabin" was universally popular, but this was certainly not true. Many people during those pre-Civil War day—particularly defenders of the slavery system—condemned it as false propaganda and poorly written melodrama (传奇剧作品). Harriet did have strong religious views against slavery (When asked how she came to write the hook, she replied: "God wrote it."), and she tried to convince people slavery was wrong, so perhaps the book could be considered propaganda. 3 Though she was born in Connecticut in 1832, as a young woman she moved to Cincinnati, Ohio, when her father accepted the presidency of newly founded Lane Theological Seminary (神学院). Ohio was a free state, but just across the Ohio River in Kentucky, Harriet saw slavery in action. 4 In 1851, Harriet Beecher Stowe began her book. Its vast influence strengthened the anti-slavery movement and angered defenders of the slavery system. 5 In fact, when Abraham Lincoln met Harriet at the White House during the Civil War, he said, "So, this is the little lady who started this big war." A. She had read a lot about the slavery system. B. Today some historians (历史学家) think that it helped bring on the American Civil War. C. But if so, it was true propaganda, because it accurately described the evils of slavery. D. For a while it outsold every book in the world, except The Bible. E. But neither she nor her first publisher thought it would be a big success. F. She lived 18 years in Cincinnati, marrying Calvin Stowe, professor of a college.

填空题 下面的短文后有2项测试任务：(1)第23～26题要求从所给出的6个选项中为第1～4段每段选择1个最佳标题；(2)第27～30题要求从所给出的6个选项中为每个句子确1个最佳选项。 Intelligence: A Changed View 1. Intelligence was believed to be a fixed entity (存在，实体), some faculty of the mind that we all possess and which determines in some way the extent of our achievements. Its value, therefore, was as a predictor of children's future learning. If they differed markedly in their ability to learn complex tasks, then it was clearly necessary to educate them differently and the need for different types of school and even different ability groups within school was obvious. Intelligence tests could be used for streaming(分流，分组) children according to ability at an early age. And at 11 these tests were superior to measures of attainment for selecting children for different types of secondary education. 2. Today, we are beginning to think differently. In the last few years, research has thrown doubts on the view that innate (内在的) intelligence can ever be measured and on the very nature of intelligence itself. There is considerable evidence now shows the great influence of environment both on achievement and intelligence. Children with poor home backgrounds not only do less well in their school work and intelligence tests but their performance tends to deteriorate gradually compared with that of their more fortunate classmates. 3. There are evidences that support the view that we have to distinguish between genetic intelligence and observed intelligence(习得智力). Any deficiency in the appropriate genes will restrict development no matter how stimulating the environment is. We cannot observe and measure innate intelligence, whereas we can observe and measure the effects of the interaction of whatever is inherited with whatever stimulation has been received from the environment. Researchers have been investigating what happens in this interaction(相互作用). 4. Two major findings have emerged from these researches. Firstly, the greatest part of the development of observed intelligence occurs in the earliest years of life. It is estimated that 50 percent of measurable intelligence at age 17 is already predictable by the age of four. Secondly, the most important factors in the environment are language and psychological aspects of the parent-child relationship. Much of the difference in measured intelligence between "privileged" and "disadvantaged" children may be due to the latter's lack of appropriate verbal stimulation and the poverty of their perceptual (感性的) experiences. 5. These research findings have led to a revision in our understanding of the nature of intelligence. Instead of it being some largely inherited fixed power of the mind, we now see it as a set of developed skills with which a person copes with any environment. These skills have to be learned and, indeed, one of them is learning how to learn. 6. The modern ideas concerning the nature of intelligence are bound to have some effect on our school system. In one respect a change is already occurring. With the move toward comprehensive education and the development of unstreamed classes, fewer children will be given the label "low IQ(智商,Intelligence Quotient)" which must inevitably condemn a child in his own, if not society's eyes. The idea that we can teach children to be intelligent in the same way that we canteach them reading or arithmetic is accepted by more and more people. A. Main Results of Recent Researches B. Popular Doubt about the New View C. Effect of Environment on Intelligence D. Intelligence and Achievement E. Impact on School Education F. A Changed View of Intelligence

填空题Einstein Named "Person of the Century" Albert Einstein, whose theories on space time and matter helped unravel (解决) the secrets of the atom and of the universe, was chosen as "Person of the Century" by Time magazine on Sunday. A man whose very name is synonymous (同义的) with scientific genius, Einstein has come to represent more than any other person the flowering of 20th century scientific though that set the stage for the age of technology." The world has changed far more in the past 100 years than in any other century in history. The reason is not political or economic, but technological—technologies that flowed directly from advances in basic science, "wrote theoretical physicist Stephen Hawking in a Time essay explaining Einstein's significance. (46) Time chose as runner-up President Franklin Roosevelt to represent the triumph of freedom and democracy over fascism, and Mahatma Gandhi as an icon (象征) for a century when civil and human rights became crucial factors in global politics. "What we saw was Franklin Roosevelt embodying the great theme of freedom's fight against totalitarianism, Gandhi personifying (象征，体现) the great theme of individuals struggling for their rights, and Einstein being both a great genius and a great symbol of a scientific revolution that brought with it amazing technological advances that helped expand the growth of freedom," said Time Magazine Editor Walter Isaacson. Einstein was born in Ulm, Germany in 1879. (47) . He was slow to learn to speak and did not do well in elementary school. He could not stomach organized learning and loathed taking exams. In 1905, however, he was to publish a theory which stands as one of the most intricate examples of human imagination in history. (48) . Everything else—mass, weight, space, even time itself—is a variable (变量). And he offered the world his now-famous equation (方程式): energy equals mass times the speed of light squared—E=mc2. (49) . "There was less faith in absolutes, not only of time and space but also of truth and morality." Einstein's famous equation was also the seed that led to the development of atomic energy and weapons. In 1939, six years after he fled European fascism and settled at Princeton University, Einstein, an avowed pacifist, signed a letter to President Roosevelt urging the United States to develop an atomic bomb before Nazi Germany did. (50) . Einstein did not work on the project. Einstein died in Princeton, New Jersey in 1955.A. "Indirectly, relativity paved the way for a new relativism in morality, art and politics," Isaacson wrote in an essay explaining Time's choices.B. How he thought of the relativity theory influenced the general public's view about Albert Einstein.C. "Clearly, no scientist better represents those advances than Albert Einstein."D. Roosevelt heeded the advice and formed the "Manhattan Project" that secretly developed the first atomic weapon.E. In his early years, Einstein did not show the promise of what he was to become.F. In his "Special Theory of Relativity," Einstein described how the only constant in the universe is the speed of light.

填空题Why do People Shrink? Did you ever see the movie Honey, I shrunk the kids? It"s about a wacky dad (who"s also a scientist) who accidentally shrinks his kids with his homemade miniaturizing invention. Oops! 1 For older people, shrinking isn"t that dramatic or sudden at all. It takes place over years and may add up to only one inch or so of their adult height (maybe a little more, maybe less), and this kind of shrinking can"t be magically reversed, although there are things that can be done to stop it or slow it down. 2 There are a few reasons. As people get older, they generally lose some muscle and fat from their bodies as part of the natural aging process. Gravity (the force that keeps your feet on the ground) takes hold, and the bones in the spine, called vertebrae, may break down or degenerate, and start to collapse into one another. 3 But perhaps the most common reason why some older people shrink is because of osteoporosis. Osteoporosis occurs when too much spongy bone tissue (which is found inside of most bones) is broken down and not enough new bone material is made. 4 Bones become smaller and weaker and can easily break if someone with osteoporosis is injured. Older people—especially women, who generally have smaller and lighter bones to begin with—are more likely to develop osteoporosis. As years go by, a person with osteoporosis shrinks a little bit. Did you know that every day you do a shrinking act? You aren"t as tall at the end of the day as you are at the beginning. That"s because as the day goes on, water in the disks of the spine gets compressed (squeezed) due to gravity, making you just a tiny bit shorter. Don"t worry, though. 5 A. They end up pressing closer together, which makes a person lose a little height and become shorter. B. Once you get a good night"s rest, your body recovers, and the next morning, you"re standing tall again. C. Over time, bone is said to be lost because it"s not being replaced. D. Luckily, there are things that people can do to prevent shrinking. E. The kids spend the rest of the movie as tiny people who are barely visible while trying to get back to their normal size. F. But why does shrinking happen at all?

填空题 Moon Exploration Many people wonder why some men want to live on the moon. {{U}} {{U}} 1 {{/U}} {{/U}}It is a silent place, where the weather is hot and sunny or cold and dark. Its surface is dull and almost colorless. There are no lakes, rivers, or plants to provide beauty. {{U}} {{U}} 2 {{/U}} {{/U}}Astronauts on the moon certainly miss the comfort of life on the earth. But man has always moved to new frontiers. Every pioneer in a new land has faced danger and hardship. Some scientists hope that continued work will be done on the moon. Many experiments will be done there more easily. {{U}} {{U}} 3 {{/U}} {{/U}}Matter can be heated to very high temperatures without chemical change when it is in a vacuum. Air, dust and clouds cannot block human being's view of space from the mood. The very high or very low temperatures and low gravity on the moon will be used for many experiments. One very important use of the moon will be to launch spacecraft. Man might be able to learn much about his own body by living on the moon. {{U}} {{U}} 4 {{/U}} {{/U}}Man would be in control of the community of life in which he lives. Bacteria could be removed from the air in this community. Gravity is one thing that would not be under human being's control. Some scientists believe the low gravity of the moon would be healthful for man. The heart would not have to work so hard. The body would need less energy to move than it does on the earth. {{U}} {{U}} 5 {{/U}} {{/U}}Much exercise would probably be needed to keep the body in good condition. A．He would be living in a habitat that he made for himself. B．However, the human body might change during long stays on the moon. C．But man cannot live there happily and comfortably. D．It is probably not the kind of place where most men would choose to live. E．A simple walk on the moon's surface is filled with danger. F．Some large experiments are very easy to do in a vacuum.

填空题阅读下面的短文，文章中有5处空白，文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。 {{B}}Don't Rely on Plankton to Save the Planet{{/B}} Encouraging plankton growth in the ocean has been touted by some as a promising way to remove carbon dioxide from the atmosphere.{{U}} (46) {{/U}}. Adding iron to patches of ocean can make plankton bloom temporarily. The microscopic organisms suck up dissolved carbon dioxide from the water, which in turn is replaced by carbon dioxide from the air.{{U}} (47) {{/U}}. Jorge Sarmiento from Princeton and his colleagues developed a complex computer model to analyse how factors such as ocean chemistry and water circulation would affect the process if 160, 000 square kilometres of ocean were seeded with iron for a month.{{U}} (48) {{/U}}. In their scenario, which covers an area 10 times as big as the largest experiment of this kind ever proposed, fertilising the ocean removes 1 million tonnes of carbon from the atmosphere -- just 0.2 per cent of the carbon dioxide humankind spews out each month. Rough estimates in the past have predicted similarly disappointing results.{{U}} (49) {{/U}}says Sallie Chisholm, an environmental engineer from the Massachusetts Institute of Technology. "But the take-home message is the same.{{U}} (50) {{/U}}"A Its opponents argue, however, that it will stop global warming.B Its opponents fear that it will damage the marine ecosystem, and now a computer model shows that the trick would also be remarkably inefficient.C As plankton die and settle on the ocean floor, their carbon is supposedly locked up in the seabed,D They found that 100 years later only between 2 and 11 per cent of the extra carbon that was originally taken up by plankton had actually been removed from the atmosphere.E "These are newer and better models,"F Ocean fertilisation is not the answer to global warming.

填空题Many local newspapers in Britain are making ______.

填空题There are many words to describe how a person thinks, feels and acts. Gordon all ports, an American psychologist, found nearly 1 8,000 English words characterizing differences in people's behavior And many of us use this information as a basis for describing, or typing, his personality.A. Even a skilled writer probably could not describe an the features that make one face different from another.B. Like the human face, human personality is very complex.C. But we can easily tell the "good guys" from the "bad guys" because the two types differ in appearance as well as in actions.E. Bookworms, conservatives, military types—people are described with such terms.F. We also tell people apart by how they behav

填空题Hints for Reading Practice Most of US can find 15 minutes or half an hour each day for some regular activity. For example, one famous surgeon always spent 15 minutes reading something before he went to sleep each day. Whether he went to bed at 10 p.m. or 2:30 a.m. made no difference. "Speed Reading" courses teach students how to read more quickly. In such courses, teachers often ask students to find out how many words a minute they are reading. You can do this too. look at your watch every 5 or 10 minutes and write down the page number you have reached. Obviously, you should not increase your reading speed if you do not understand what you are reading. If you find something you don"t understand in the book, or you cannot clearly remember the details of what you read, why not read the chapter again? Take four or five pages of an interesting book you happen to be reading now. Read these pages as fast as you can. Don"t worry about whether you understand or not. If you keep doing this "lightning speed" reading for a period of time, you will usually find that your normal speed has increased. Most paragraphs in an article have a topic sentence that expresses the central idea. The opening paragraph often suggests the general direction and content of the article, while paragraphs that follow expand or support the first. The closing paragraph often gives a summary of the most important points of the article.

填空题Every Dog Has His Say Kimiko Fukuda always wondered what her dog was trying to say. Whenever she put on makeup, it would pull at her sleeve. (1) When the dog barks, she glances at a small electronic gadget (装置). The following "human" translation appears on its screen: "Please take me with you." "I realized that's how he was feeling," says Fukuda. The gadget is called Bowlingual, and it translates dog barks into feelings. People laughed when the Japanese toymaker Takara Company made the world's first dog-human translation machine in 2002. But 300,000 Japanese dog owners bought it. (2) "Nobody else had thought about it," said Masahiko Kajita, who works for Takara. "We spend so much time training dogs to understand our orders; what would it be like if we could understand dogs?" Bowlingual has two parts. (3) The translation is done in the gadget using a database containing every kind of bark. Based on animal behaviour research, these noises are divided into six categories, happiness, sadness, frustration, anger, declaration and desire. (4) In this way, the database scientifically matches a bark to an emotion, which is then translated into one of 200 phrases. When a visitor went to Fukuda's house recently, the dog barked a loud "bow wow". (5) It was followed by "I'm stronger than you" as the dog growled and sniffed (嗅) at the visitor. The product will be available in U.S. pet stores this summer for about U.S. $120. It can store up to 100 barks, even recording the dog's emotions when the owner is away. A．A wireless microphone is attached to the dog's collar, which sends information to the gadget held by the owner. B．Nobody really knows how a dog feels. C．This translated as "Don't come this way". D．More customers are expected when the English version is launched this summer. E．Now, the Japanese girl thinks she knows. F．Each one of these emotions is then linked to a phrase like "Let's play", "Look at me", or "Spend more time with me".

填空题A physically and mentally active B be alert and receptive C engage in mental, activities D the benefits of challenging the brain E beneficial and happy F maintain mental alertness

填空题Disposed oil and many other items can be reused to ______.

填空题Mt. Desert Island The coast of the State of Maine is one of the most irregular in the world. A straight line running from the southernmost coastal city to the northernmost coastal city would measure about 225 miles. If you followed the coastline between these points, you would travel more than ten times as far. This irregularity is the result of what is called a drowned coastline. ______(46) At that time, the whole area that is now Maine was part of a mountain range that towered above the sea. As the glacier(冰川) descended, however, it expended enormous force on those mountains, and they sank into the sea. As tbe mountains sank, ocean water charged over the lowest parts of the remaining land, forming a series of twisting inlets and lagoons(咸水湖). The highest parts of the former mountain range, nearest the shore, remained as islands. ______(47) Marine fossils found here were 225 feet above sea level, indicating the level of the shoreline prior to the glacier. The 2.500-mile long rocky coastline of Maine keeps watch over nearly two thousand islands. Many of these islands are tiny and uninhabited, but many are home lo thriving communities. Mt. Desert Island is one of the largest, most beautiful of the Maine coast islands. Measuring 16 miles by 12 miles, Mt. Desert was essentially formed as two distinct islands. ______(48) For years, Mt. Desert Island. particularly its major settlement, Bar Harbor, afforded summer homes for the wealthy. Recently though, Bar Harbor has become a rapidly growing arts community as well. But, the best part of the island is the unspoiled forest land known as Acadia National Park. Because the island sits on the boundary line between the temperate(温带)and sub-Arctic zones, the island supports the plants and animals of both zones as well as beach, inland, and alpine(高山的)plants. ______(49) The establishment of Acadia National Park in 1916 means that this natural reserve will be perpetually available to all people, not just the wealthy. Visitors to Acadia may receive nature instruction from the park naturalists as well as enjoy camping, cycling, and boating. Or they may choose to spend time at the archeological museum, learning about the Stone Age inhabitants of the island. The best view on Mt. Desert Island is from the top of Cadillac Mountain. ______(50)From the summit, you can gaze back toward the mainland or out over the Atlantic Ocean and contemplate the beauty created by a retreating glacier.A. This mountain rises 1, 532 feet, making it the highest mountain on the Atlantic seaboard.B. It is split almost in half by Somes Sound, a deep and narrow stretch of water, seven miles long.C. h also ties in a major bird migration lane and is a resting spot for many birds.D. The term comes from the activity of the ice age.E. Mt. Desert Island is one of the most famous of all the islands left behind by the glacier.F. The wealthy residents of Mr. Desert Island selfishly kept it to themselves.

填空题 下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第3～6段每段选择1个最佳标题：(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 More Than 8 Hours Sleep Too Much of a Good Thing Although the dangers of too little sleep are widely known, new research suggests that people who sleep too much may also suffer the consequences. Investigators at the University of California in San Diego found that people who clock up 9 or 10 hours each weeknight appear to have more trouble falling and staying asleep, as well as a number of other sleep problems, than people who sleep 8 hours a night. People who slept only 7 hours each night also said they had more trouble falling asleep and feeling refreshed after a night's sleep than 8-hour sleepers. These findings, which Dr. Daniel Kripke reported in the journal Psychosomatic Medicine, demonstrate that people who want to get a good night's rest may not need to set aside more than 8 hours a night. He added that "it might be a good idea" for people who sleep more than 8 hours each night to consider reducing the amount of time they spend in bed, but cautioned that more research is needed to confirm this. Previous studies have shown the potential dangers of chronic shortages of sleep -- for instance, one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more. For the current report, Kripke reviewed the responses of 1,004 adults to sleep questionnaires, in which participants indicated how much they slept during the Week and whether they experienced any sleep problems. Sleep problems included waking in the middle of the night, arising early in the morning and being unable to fall back to sleep, and having fatigue interfere with day-to-day functioning. Kripke found that people who slept between 9 and 10 hours each night were more likely to report experiencing each sleep problem than people who slept 8 hours. In an interview, Kripke noted that long sleepers may struggle to get rest at night simply because they spend too much time in bed. As evidence, he added that one way to help insomnia is to spend less time in bed. "It stands to reason that if a person spends too long a time in bed, then they'll spend a higher percentage of time awake. " he said. A. Keprike's Research Tool B. Dangers of Habitual Shortages of Sleep C. Criticism on Kripke's Report D. A way of Overcoming Insomnia E. Sleep Problems of Long and Short Sleepers F. Classification of Sleen Problems

填空题下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。{{B}}What'sLackingin"Sicko"?{{/B}}Whenitcomestoeconomicdecisions,therearealwaystrade-offs(取舍).Gainonethingandyoulosesomethingelse.{{U}}(46){{/U}}.ThecentralargumentofMichaelMoore'smovie"Sicko"-thatthecuretothenation'shealthcareproblemsisasingle-payersystem-ishardlynovelandiscertainlyworthconsideration,whetherornotyouagreewithit.ButincomparingtheAmericansystemwithsingle-payerplansofothercountries-Britain,France,CanadaandCuba-Mr.Mooreleftoutthetrade-offs,characterizingthosecountriesashealthcareparadises.{{U}}(47){{/U}}.KurtLeder,thefilmcriticwhoisbestknownastheanchor(主持人)of"MTVNews,"wroteacritique(批评)ofthefilmforMTV'swebsite."’Sicko’,"hesaid,"doesarealservice"inportraying(描绘)victimsofAmericaninsurancecompanies-likethepeoplewhodiedbecause,theironlytreatmentoptionswereconsidered"experimental"andthereforenotcovered.{{U}}(48){{/U}}.When"governmentsattempttoregulatethebalancebetweenalimitedsupplyofhealthcareandanunlimiteddemandforit,they'reinevitablyforcedtorationtreatment,"Mr.Loderasserted.{{U}}(49){{/U}}Mr.Lodercitedtheshortfilm"DeadMeat,"whichpresentsanecdotes(轶事)offailureintheCanadiansingle-payersystem.Initsone-sidedness,"DeadMeat"mighthavemadeforanicedoublefeaturewith"Sicko,"andleftmoviegoerswithamorecompleteunderstandingofthecomplicationsofdecidingonahealthcaresystem.{{U}}(50){{/U}}.Thisallmakesanotherwise"emotionallycompellingfilmnotnecessarilyanintellectuallysatisfyingone,"wroteDarrenBarefoot,aCanadianblogger(博客作者).AMr.Moorealsodecidedtoignoreproblemsinothercountries,likeFrance'shightaxesandBritain'scash-shorthospitals.BButthefilmasawhole,heconcluded,is"breathtakinglymeretricious(似是而非的),"inlargepartbecauseofitscharacterizationsofothercountries'healthcaresystems.CTheproblemshavebeennoticed-andcriticismis"comingnotjustfromMr.Moore'sdetractors(底毁者).DHetickedoffanumberofnegativestatisticstocounterthepositiveonesofferedbyMr.Moore.EHealthcareistheprevention,treatment,andmanagementofillness.FThisisparticularlytrueinhealthcare,amarketinwhichscarce(稀罕的)goodsareridiculouslyexpensive,butneededbyeverybody.

填空题Next the thinker must define the problem. Before Sam can repair his bicycle, he must find the reason why it does not work. ______ He must make his problem more specific.A. However, when all these methods fail, the person with a problem has to start analyzing.B. Eventually one suggestion seems to be the solution to the problem.C. He immediately realizes the solution to his problem: he must clean the gear wheels.D. For instance, he must determine if the problem is with the gears, the brakes, or the flame.E. After studying the problem, the person should have several suggestions for a possible solution.F. In short, he has solved the problem.

填空题Teach Your Child Science 1. It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Don't only give facts, but try to give explanations as well. 2. Science is not just knowledge; it is a way of thinking, a method of finding out about the world. We see something. We try to explain it, and we test our idea by setting up an experiment. One day you come home and find the plant on the table has fallen over. You think it might be the wind from the open window or the cat, so you close the window, but leave the cat in and see what happens (you can also try leaving the window open and shutting the cat out). Of course, you remember there may be a third explanation. 3. Ask your child to get a piece of string, some salt, a glass of water and an ice cube (冰块). Tell her to put the ice in the water, and then put one end of the string on the ice, leaving the other end over the side of the glass. Put a little salt on the ice. Wait a minute, and then pull the string; it should be attached to the ice. Ask the child: "what has happened?" 4. Probably she won't know. Ask her whether fresh water or salt water freezes into ice first. If you live near the sea and have a cold winter, she should know fresh water freezes first as she will have seen that happen. Show her how to test the idea by half-filling two paper cups with water, adding salt to one. Then put them in the icebox and check every three minutes. Write the results in a table. The conclusion will be that salt changes the behaviour of water. 'Thinking about the string, we see the salt turned some of the ice into water. Then the salt went away into the water and the ice froze again leaving the string attached. 5. Then you can ask, "Will water with salt boil at the same temperature as water without salt?" She can think, tell you her idea and (taking care because of the heat) you can test it in the kitchen. A. What exactly is science? B. How do you find an explanation? C. What topics do you need? D. How do you answer your child's questions? E. Where does your child study science? F. How do you set up the experiment on salt and water?

填空题A. What exactly is science?B. How do you find an explanation?C. What topics do you need?D. How do you answer your child's questions?E. Where does your child study science?F. How do you set up the experiment on salt and water?

填空题阅读下面的短文，文章中有5处空白，文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。 {{B}}The Magic of Sound{{/B}} Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays, music has an added function: it not only moves people but also can shock people. Is it true that an ordinary musical instrument can be so powerful? Our eardrums can withstand sound within 20 to 80 decibels. Once sound exceeds this limit, even beautiful music will become ear-splitting noise and harm health. A strong blast of high sound can twist and break a solid iron sheet.{{U}} (46) {{/U}} The noise from a plane's engine is over 140 decibels. However, the sound of a flute is at most a few decibels.{{U}} (47) {{/U}}It has been proven that people who have worked in an environment with a high sound intensity for a long time suffer varying degrees of heart disease or altered brain waves. In movies, sometimes the hero can produce a sound that ordinary people can't hear and only those who have the same ability can feel. In nature, there is actually sound that is beyond our hearing. In physics, the sound that exceeds 20,000 Hz is called ultrasonic. {{U}}(48) {{/U}}It does no harm to health. Sound less than 20 Hz is called infrasonic waves. When we move, the air will vibrate. {{U}}(49) {{/U}}As the frequency of infrasonic waves is close to that of people's internal organs, infrasonic wave may cause resonance in human bodies. As a result, people's vision may weaken and internal organs may rupture. However, whether an infrasonic wave can be used as a weapon depends on its intensity. If its intensity is very low, it won't damage internal organs or a person's health. {{U}}(50) {{/U}}When wind blows at a force of 3 or 4 over the sea6, it will produce infrasonic waves of several decibels. Only typhoons can produce infrasonic waves of over 100 decibels. At present, scientists can only produce infrasonic weapons in the lab with the help of advanced scientific tools and powerful electric power.A. High sound of 150 decibels can kill a healthy rat.B. The vibration of air can produce infrasonic waves.C. We cannot play high-pitched music with ordinary musical instruments.D. If the intensity of infrasonic wave exceeds 160 decibels, it is extremely harmful.E. Dolphins, whales and bats can make such high-frequency sound.F. Therefore, the sound of ordinary musical instruments cannot harm your health.