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Passage 2Life Beyond Earth A We all have our suppositions, our scenarios. The late astronomer Carl Sagan estimated that there are a million technological civilizations in our galaxy alone. His more conservative colleague Frank Drake offers the number 10,000. John Oro, a pioneering comet researcher, calculates that the Milky Way is sprinkled with a hundred civilizations. And finally there are skeptics like Ben Zuckerman, an astronomer at UCLA, who thinks we may as well be alone in this galaxy if not in the universe. B All the estimates are highly speculative. The fact is that there is no conclusive evidence of any life beyond Earth. Absence of evidence is not evidence of absence, as various pundits have wisely noted. But still we don’t have any solid knowledge about a single alien microbe, a solitary spore, much less the hubcap from a passing alien starship. C Our ideas about extraterrestrial life are what Sagan called “plausibility arguments,” usually shot through with unknowns, hunches, ideologies, and random ought-to-bes. Even if we convince ourselves that there must be life out there, we confront a second problem, which is that we don’t know anything about that life. We don’t know how truly alien it is. We don’t know if it’s built on a foundation of carbon atoms. We don’t know if it requires a liquid-water medium, if it swims or flies or burrows. D Despite the enveloping nebula of uncertainties, extraterrestrial life has become an increasingly exciting area of scientific inquiry. The field is called exobiology or astrobiology or bioastronomy—every few years it seems as though the name has been changed to protect the ignorant. E Whatever it’s called, this is a science infused with optimism. We now know that the universe may be aswarm with planets. Since 1995 astronomers have detected at least 22 planets orbiting other stars. NASA hopes to build a telescope called the Terrestrial Planet Finder to search for Earth-like planets, examining them for the atmospheric signatures of a living world. In the past decade organisms have been found thriving on our own planet in bizarre, hostile environments. If microbes can live in the pores of rock deep beneath the earth or at the rim of a scalding Yellowstone spring, then they might find a place like Mars not so shabby. F Mars is in the midst of a full-scale invasion from Earth, from polar landers to global surveyors to rovers looking for fossils. A canister of Mars rocks will be rocketed back to Earth in the year 2008, parachuting into the Utah desert for scrutiny by scientists in a carefully sealed lab. In the coming years probes will also go around and, at some point, into Jupiter’s moon Europa. That icy world shows numerous signs of having a subsurface ocean—and could conceivably harbor a dark, cold biosphere. G The quest for an alien microbe is supplemented by a continuing effort to find something large, intelligent, and communicative. SETI—the Search for Extraterrestrial Intelligence—has not yielded a confirmed signal from an alien civilization in 40 years of experiments, but the signal-processing technology grows more sophisticated each year. The optimists figure it’s only a matter of time before we tune in the right channel. H No one knows when—or if—one of these investigations might make a breakthrough. There’s a fair bit of boosterism surrounding the entire field, but I’d bet the breakthrough is many years, if not decades, away. The simple truth: Extraterrestrial life, by definition, is not conveniently located. I But there are other truths that sustain the search for alien organisms. One is that, roughly speaking, the universe looks habitable. Another is that life radiates information about itself—that, if nothing else, it usually leaves a residue or an imprint. If the universe contains an abundance of life, that life is not likely to remain forever in the realm of the unknown. J Contact with an alien civilization would be an epochal and culturally challenging event, but exobiologists would settle gladly for the discovery of a tiny fossil, a mere remnant of extraterrestrial biochemistry. One example. One data point to add to the one we have—Earth life. That’s what we need to begin the long process of putting human existence in its true cosmic context. Complete the sentences. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxes 1-5 on your answer sheet. 1. Experts are approaching Mars extensively in the search of ______. 2 Jupiter’s moon Europa will be in the analysed for it is conceived to embrace a ______ probably hostile to life. 3. Although no clear signals have been received by human being, advances made in ______ has provided some optimism after 40 years’ experiments. 4. The reason why extraterrestrial life cannot be immediately found is that it is not readily ______. 5. The look for alien organism can still be sustained because it would still give off traces such as a ______.
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更多 “问答题Passage 2Life Beyond Earth A We all have our suppositions, our scenarios. The late astronomer Carl Sagan estimated that there are a million technological civilizations in our galaxy alone. His more conservative colleague Frank Drake offers the number 10,000. John Oro, a pioneering comet researcher, calculates that the Milky Way is sprinkled with a hundred civilizations. And finally there are skeptics like Ben Zuckerman, an astronomer at UCLA, who thinks we may as well be alone in this galaxy if not in the universe. B All the estimates are highly speculative. The fact is that there is no conclusive evidence of any life beyond Earth. Absence of evidence is not evidence of absence, as various pundits have wisely noted. But still we don’t have any solid knowledge about a single alien microbe, a solitary spore, much less the hubcap from a passing alien starship. C Our ideas about extraterrestrial life are what Sagan called “plausibility arguments,” usually shot through with unknowns, hunches, ideologies, and random ought-to-bes. Even if we convince ourselves that there must be life out there, we confront a second problem, which is that we don’t know anything about that life. We don’t know how truly alien it is. We don’t know if it’s built on a foundation of carbon atoms. We don’t know if it requires a liquid-water medium, if it swims or flies or burrows. D Despite the enveloping nebula of uncertainties, extraterrestrial life has become an increasingly exciting area of scientific inquiry. The field is called exobiology or astrobiology or bioastronomy—every few years it seems as though the name has been changed to protect the ignorant. E Whatever it’s called, this is a science infused with optimism. We now know that the universe may be aswarm with planets. Since 1995 astronomers have detected at least 22 planets orbiting other stars. NASA hopes to build a telescope called the Terrestrial Planet Finder to search for Earth-like planets, examining them for the atmospheric signatures of a living world. In the past decade organisms have been found thriving on our own planet in bizarre, hostile environments. If microbes can live in the pores of rock deep beneath the earth or at the rim of a scalding Yellowstone spring, then they might find a place like Mars not so shabby. F Mars is in the midst of a full-scale invasion from Earth, from polar landers to global surveyors to rovers looking for fossils. A canister of Mars rocks will be rocketed back to Earth in the year 2008, parachuting into the Utah desert for scrutiny by scientists in a carefully sealed lab. In the coming years probes will also go around and, at some point, into Jupiter’s moon Europa. That icy world shows numerous signs of having a subsurface ocean—and could conceivably harbor a dark, cold biosphere. G The quest for an alien microbe is supplemented by a continuing effort to find something large, intelligent, and communicative. SETI—the Search for Extraterrestrial Intelligence—has not yielded a confirmed signal from an alien civilization in 40 years of experiments, but the signal-processing technology grows more sophisticated each year. The optimists figure it’s only a matter of time before we tune in the right channel. H No one knows when—or if—one of these investigations might make a breakthrough. There’s a fair bit of boosterism surrounding the entire field, but I’d bet the breakthrough is many years, if not decades, away. The simple truth: Extraterrestrial life, by definition, is not conveniently located. I But there are other truths that sustain the search for alien organisms. One is that, roughly speaking, the universe looks habitable. Another is that life radiates information about itself—that, if nothing else, it usually leaves a residue or an imprint. If the universe contains an abundance of life, that life is not likely to remain forever in the realm of the unknown. J Contact with an alien civilization would be an epochal and culturally challenging event, but exobiologists would settle gladly for the discovery of a tiny fossil, a mere remnant of extraterrestrial biochemistry. One example. One data point to add to the one we have—Earth life. That’s what we need to begin the long process of putting human existence in its true cosmic context. Complete the sentences. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxes 1-5 on your answer sheet. 1. Experts are approaching Mars extensively in the search of ______. 2 Jupiter’s moon Europa will be in the analysed for it is conceived to embrace a ______ probably hostile to life. 3. Although no clear signals have been received by human being, advances made in ______ has provided some optimism after 40 years’ experiments. 4. The reason why extraterrestrial life cannot be immediately found is that it is not readily ______. 5. The look for alien organism can still be sustained because it would still give off traces such as a ______.” 相关考题
考题
How men first learnt to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to express thought and feelings, actions and things, so that they could communicate with each other; and that later they agreed upon certain signs, called letters, which could be combined to present those sounds, and which could be written down. Those sounds, whether spoken or written in letters, we call words. The power of words, then, lies in their associations - the things they bring up before our minds. Words become filled with meaning for us by experience; and the longer we live, the more certain words recall to us the glad and sad events of our past; and the more we read and learn, the more the number of words that mean something increases. Great writers are those who not only have great thoughts but also express these thoughts in words which appeal powerfully to our minds and emotions. This charming and telling use of words is what we call literary style. Above all, the real poet is a master of words. He can convey his meaning in words which sing like music and which by their position and association can move men to tears. We should therefore learn to choose our words carefully and use them accurately, or they will make our speech silly and vulgar. What is true about words?：A、They are used to express feelings onlyB、They can not be written downC、They are simply soundsD、They are mysterious.
考题
Most of us，when we reached our teens，started looking forward to the day when we would occupy places of our own，far from the confines of our families. We saw this moving away as a chance to strike out on our own，to grow，to spread out wings and experience freedom. At the same time，we regarded this independence as temporary-the thing to do until we found the perfect mate and married. Over the years，many millions of people have made this passage from one family to another，with just a brief，often nervous interval of independence in between. But recently，more and more people have begun to challenge the concept that living together is better than living alone. Being single is now accepted as an alternative lifestyle-one that is natural，rewarding，and complete. In fact，being single has become almost fashionable.
考题
What is the problem with human beings according to Amrit Desai?A、We have become addicted and greedy consumersB、We ignore the connection between our demands and the exploitation of Earth.C、We care for our earth a lot.D、We often abuse the natural resources for our well-being.
考题
"My daughter speaks with a wisdom beyond her years. We have all come here with anger in our hearts, but she comes with courage and understanding." is said by().A、PocahontasB、Grandma WillowC、John SmithD、Pocahontas' dad
考题
In recent years travel companies have succeeded in selling us the idea that the further we go, ( ).
A、the better will our holiday beB、the better our holiday will beC、our holidays will be the betterD、our holiday will be better
考题
We have spent all of our spare time()our spare money on the project.A. as soon asB. as long asC. as well as
考题
As you will see in our price-list, we have offered very competitive prices, supplying you our best quality goods.We solicit that you will favor us with your orders, which shall always have our best attention.(英译中)
考题
The sentence "But we pay for our sensitivity." in the third paragraph implies that______.A) we should pay a debt for, our feelingB) we have to be hurt when We feel somethingC) our pain is worth feelingD) when we feel pain, we are suffering it
考题
30． What is the passage mainly about? 、A． We must make more friends．B． Don-t quarrel with our parents．C． What should we do when our parents quarrel．D． Sometimes we must stay away from our parents．
考题
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
On Venus there is a lot of__________.A. water
B. carbon dioxide
C. carbon monoxide
D. oxygen
考题
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
Algae are plants that can__________.
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A．live in very hot temperatures
B．live in very cold temperatures
C．manufacture oxygen
D．all of the above
考题
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet.By the middle of the 21st century,if present trends continue, we will have used up all the oil that drives our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on earth will make it necessary for lus to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however,has recently been suggested by American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are compleetely exhausted it will be possible to change the atmophere of Venus and so create a new world almost as large as earth itself. The difficult is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen,should be bred in condition similar to those on Venus.As soon as this has been done, the algae will be placed in small rockets. Spaceship will then fly to Venus and fire the rockets into the atmosphere .In a fairly short time, the alge will break down the carbon dioxide into oxygen and carbon.
When the algae have done theri work, the atmosphere will become cooler,but befor man can set foot on Venus it will be neccessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
Carl Sagan believes that Venus might be colonized from earth because _____
a.it might be possible to change its atmosphere
b.its atmosphere is the same as the earth's
c.there is a good supply of water on Venus
d.the days on Venus are long enough
考题
共用题干
The Need to RememberSome people say they have no memory at all:"I just can't remember a thing!"But of course we all have a memory.Our memory tells us who we are.Our memory helps us to make use in the present of what we have learnt in the past.In fact we have different types of memory.For example,our visual memory helps us recall facts and places.Some people have such a strong visual memory that they can remember exactly what they have seen,for example,pages of a book,as a complete picture.Our verbal（言语的）memory helps us remember words and figures we may have heard but not seen or written:Items of a shopping list,a chemical formula,dates,or a recipe.With our emotional（情感的）memory, we recall situations or places where we had; strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell,taste, touch and sound,and for performing physical movements.We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial.Our long-term mem-ory,on the other hand,may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term .They may forget what they have done only a few hours ago,but have the clearest remembrance（记忆）of when they were very young.Psychologists tell us that we only remember a few facts about our past,and that we invent the rest. It is as though we remember only the outline of a story.We then make up the details. We of-ten do this in the way we want to remember them,usually so that we appear as the heroes of our own past , or maybe victims needing sympathy（同情）. Visual memory helps us recall a place we have been to.A: RightB: WrongC: Not mentioned
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共用题干
The Need to RememberSome people say they have no memory at all:"I just can't remember a thing!"But of course we all have a memory.Our memory tells us who we are.Our memory helps us to make use in the present of what we have learnt in the past.In fact we have different types of memory.For example,our visual memory helps us recall facts and places.Some people have such a strong visual memory that they can remember exactly what they have seen,for example,pages of a book,as a complete picture.Our verbal（言语的）memory helps us remember words and figures we may have heard but not seen or written:Items of a shopping list,a chemical formula,dates,or a recipe.With our emotional（情感的）memory, we recall situations or places where we had; strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell,taste, touch and sound,and for performing physical movements.We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial.Our long-term mem-ory,on the other hand,may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term .They may forget what they have done only a few hours ago,but have the clearest remembrance（记忆）of when they were very young.Psychologists tell us that we only remember a few facts about our past,and that we invent the rest. It is as though we remember only the outline of a story.We then make up the details. We of-ten do this in the way we want to remember them,usually so that we appear as the heroes of our own past , or maybe victims needing sympathy（同情）. Animals do not have a long-term memory.A: RightB: WrongC: Not mentioned
考题
共用题干
The Need to RememberSome people say they have no memory at all:"I just can't remember a thing!"But of course we all have a memory.Our memory tells us who we are.Our memory helps us to make use in the present of what we have learnt in the past.In fact we have different types of memory.For example,our visual memory helps us recall facts and places.Some people have such a strong visual memory that they can remember exactly what they have seen,for example,pages of a book,as a complete picture.Our verbal（言语的）memory helps us remember words and figures we may have heard but not seen or written:Items of a shopping list,a chemical formula,dates,or a recipe.With our emotional（情感的）memory, we recall situations or places where we had; strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell,taste, touch and sound,and for performing physical movements.We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial.Our long-term mem-ory,on the other hand,may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term .They may forget what they have done only a few hours ago,but have the clearest remembrance（记忆）of when they were very young.Psychologists tell us that we only remember a few facts about our past,and that we invent the rest. It is as though we remember only the outline of a story.We then make up the details. We of-ten do this in the way we want to remember them,usually so that we appear as the heroes of our own past , or maybe victims needing sympathy（同情）. Visual memory may be used when we read a story.A: RightB: WrongC: Not mentioned
考题
共用题干
The Need to RememberSome people say they have no memory at all:"I just can't remember a thing!"But of course we all have a memory.Our memory tells us who we are.Our memory helps us to make use in the present of what we have learnt in the past.In fact we have different types of memory.For example,our visual memory helps us recall facts and places.Some people have such a strong visual memory that they can remember exactly what they have seen,for example,pages of a book,as a complete picture.Our verbal（言语的）memory helps us remember words and figures we may have heard but not seen or written:Items of a shopping list,a chemical formula,dates,or a recipe.With our emotional（情感的）memory, we recall situations or places where we had; strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell,taste, touch and sound,and for performing physical movements.We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial.Our long-term mem-ory,on the other hand,may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term .They may forget what they have done only a few hours ago,but have the clearest remembrance（记忆）of when they were very young.Psychologists tell us that we only remember a few facts about our past,and that we invent the rest. It is as though we remember only the outline of a story.We then make up the details. We of-ten do this in the way we want to remember them,usually so that we appear as the heroes of our own past , or maybe victims needing sympathy（同情）. Long-term memory is more important than short-term memory.A: RightB: WrongC: Not mentioned
考题
问答题Practice 1 We have learned from our Embassy that you are interested in importing Chinese silk products. We are a long-established exporter of silk products in China and we have a very good reputation both at home and abroad. Our products sell well all over the world and highly valued by our customers for their excellent quality and fine workmanship(工艺). Enclosed are our catalogue and price list covering all the products. We are looking forward to your early reply.
考题
单选题The greatest chance for the existence of extraterrestrial life is on a planet beyond our solar system. The Milky Way galaxy alone contains 100 billion other suns, many of which could be accompanied by planets similar enough to Earth to make them suitable abodes of life. The statement above assumes which of the following?A
Living creatures on another planet would probably have the same appearance as those on Earth.B
Life cannot exist on other planets in our solar system.C
If the appropriate physical conditions exist, life is an inevitable consequence.D
More than one of the suns in the galaxy is accompanied by an Earth-like planet.E
It is likely that life on another planet would require conditions similar to those on Earth.
考题
问答题There are great impediments to the general use of a standard in pronunciationcomparable to that existing in spelling (orthography). One is thefact that pronunciation is learnt ‘naturally’ and unconsciously, and orthography 1．_______is learnt deliberately and consciously. Large numbers of us, in fact, remainthroughout our lives quite unconscious with what our speech sounds 2．_______like when we speak out, and it often comes as a shock when we 3．_______firstly hear a recording of ourselves. It is not a voice we recognize at once, 4．_______whereas our own handwriting is something which we almost always know. We 5．_______begin the ‘natural’ learning of pronunciation long before we start learning toread or write, and in our early years we went on unconsciously imitating and 6．_______practicing the pronunciation of those around us for many more hours per every 7．_______day than we ever have to spend learning even our difficult English spelling.This is ‘natural’, therefore, that our speech-sounds should be those of our im 8．_______mediate circle; after all, as we have seen, speech operates as a means of holding acommunity and to give a sense of ‘belonging’. We learn quite early to recognize a 9．_______‘stranger’, someone who speaks with an accent of a different community — perhapsonly a few miles far. 10．_______
考题
问答题Practice 6 In the course of our history, only a handful of generations have been asked to confront challenges as serious as the ones we face right now. But despite all of this—despite the enormity of the task that lies ahead—I stand here today as hopeful as ever that the United States of America will endure, that it will prevail, that the dream of our founders will live on in our time. It is this thread that binds us together in common effort; that runs through every memorial on this mall; that connects us to all those who struggled and sacrificed and stood here before. It is how this nation has overcome the greatest differences and the longest odds—because there is no obstacle that can stand in the way of millions of voices calling for change. There is no doubt that our road will be long, that our climb will be steep. But never forget that the true character of our nation is revealed not during times of comfort and ease, but by the right we do when the moment is hard. I ask you to help reveal that character once more, and together, we can carry forward as one nation, and one people, the legacy of our forefathers that we celebrate today. (We Are One: The Obama Inaugural Celebration at the Lincoln Memorial)
考题
问答题Practice 7 That we are in the midst of crisis is now well understood. Our nation is at war, against a far- reaching network of violence and hatred. Our economy is badly weakened, a consequence of greed and irresponsibility on the part of some, but also our collective failure to make hard choices and prepare the nation for a new age. Homes have been lost; jobs shed; businesses shuttered. Our healthcare is too costly; our schools fail too many; and each day brings further evidence that the ways we use energy strengthen our adversaries and threaten our planet. On this day, we gather because we have chosen hope over fear, unity of purpose over conflict and discord. On this day, we come to proclaim an end to the petty grievances and false promises, the recriminations and worn out dogmas, that for far too long have strangled our politics. This is the journey we continue today. We remain the most prosperous, powerful nation on Earth. Our workers are no less productive than when this crisis began. Our minds are no less inventive, our goods and services no less needed than they were last week or last month or last year. Our capacity remains undiminished. But our time of standing pat, of protecting narrow interests and putting off unpleasant decisions - that time has surely passed. Starting today, we must pick ourselves up, dust ourselves off, and begin again the work of remaking America. (Barack Obama: Inaugural Address)
考题
问答题In this section, there is one passage followed by a summary. Read the passage carefully, and then complete the summary below by choosing a maximum of three words from the passage to fill in each of the blanks. Remember to write the answers on the answer sheet. Questions 1 to 5 are based on the following passage. Everyone knows about pollution in the environment. Water, air, and land are all polluted. This means that pollution is everywhere. Now, scientists are looking inside our bodies to find out about internal pollution. In 2003, the Environmental Working Group studied nine people to measure the chemicals in their bodies. These nine people had an average of 53 cancer-causing chemicals in their bodies. They also had an average of 62 chemicals that can damage the brain, and 55 that can harm babies in pregnant women. Even though a lot of chemicals were found in human bodies, the chemicals were found in small amounts. The amounts were small enough that they were probably not hurting the people. However, scientists are worried because most of these chemicals were created by humans. Most of these chemicals did not exist 75 years ago. This proves that we have not only polluted the world—we have polluted our own bodies! How does this pollution get into our bodies? We come into contact with many chemicals every day. For example, everyone uses soap, skin lotion, and shampoo. However, few people know that these products contain harmful chemicals, some of which may cause memory loss. Chemicals known as DEA (diethanolamine) and TEA (triethanolamine) may seep into the skin and stop us from absorbing a helpful nutrient called “choline”. Choline is a nutrient that plays a crucial role in the memory cell making process in the developing brain. Some people worry that every time we wash our hair, we are decreasing our memories. Everyone knows they should brush their teeth regularly, but recent research has shown that some toothpastes can cause cancer. Fluoride is a key ingredient in many toothpastes. However, studies show that fluoride does not really protect our teeth. In fact, fluoride has been connected with bone cancer and other diseases. While we are trying to save our smiles, we could be damaging our health. Women are probably exposed to more chemicals than men because they use more beauty products. Recently, harmful chemicals have been found in nail polish, hair spray, deodorant, and perfume. The chemicals are called “phthalates”. Studies on animals have shown that phthalates can damage the liver, the kidneys, and the lungs. Cosmetic companies say the amounts of phthalates in their products are safe, but consumer protection groups disagree. They say some women use so many products that the levels are actually high. So, the more women try to look beautiful, the more they could be harming their health. In a futuristic story by Ray Bradbury, a man found a pristine stream on a new planet. When he drank from the stream, he died! Why? His body was so polluted that pure water was a poison to him! Perhaps that is only science fiction, but it reminds us to take care of our bodies. We must find ways to reduce the pollution we absorb. Summary: Like our polluted environment, our bodies are no longer pollution-free. Scientists now know that there is pollution in our bodies. On 1 , we have 53 cancer-causing chemicals in our bodies. Even fluoride 2 with bone cancer and other diseases. Some common cosmetics contain small amounts of chemicals, which seep into our 3 when we use these products. They prevent us from absorbing the 4 our bodies need. So, it is 5 that we find ways to reduce the amount of chemicals in our bodies. We should remind our friends and families to take care of their bodies.
考题
问答题More and more, the operations of our businesses, governments, and financial institutions are controlled by information that exists only inside computer memories. Anyone clever enough to modify this information for his own purposes can reap big reward. Even worse, a number of people who have done this and been caught at it have managed to get away without punishment.
考题
单选题We have done all we could and now our cherished project is at the mercy of our new CEO.A
under the guidance ofB
in the power ofC
with the guidance ofD
on the agenda of
考题
问答题Practice 4 The answer is, in a sense, all in our minds. For the last century, our society’s basic drive has been toward more—toward a bigger national economy, toward more stuff for each of us. And it’ s worked. Our economy is enormous; our houses are enormous. We are living large. All that more is created by using cheap energy and hence built on carbon dioxide (CO2)—which makes up 72% of all greenhouse gases. Some pollutants decrease as we get richer. But carbon dioxide consistency tracks economic growth. As Harvard economist Friedman concluded last year, CO2 is “the one major environmental contaminant for which no study has ever found any indication of improvement as living standards rise.” This means that if we’re going to cope with global warming, we may also have to cope with the end of infinite economic expansion. That sounds gloomy, but maybe not. New data suggest that we’ve been overstating the issue for many decades. We made an assumption that more was better. It seemed a reasonable thinking. But in recent years, economists, sociologists and other researchers have begun to question that link. Indeed, they’re finding that at least since the 1950’s, more material prosperity has yielded little increase in humans’ satisfaction.
考题
单选题When our imports ______ our exports, we say we have a favorable trade balance; however, when our imports and exports are the other way round we say we have an unfavorable trade balance.A
fall shortB
fall short ofC
run out ofD
are lack of
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