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For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.
Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants（污染物）can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.
People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.
As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.
1. Generally speaking, indoor air pollution may be more harmful than the air outside because _ .
A．indoor air pollution can often make people seriously ill
B．there may be more harmful gases outside the buildings
C．man-made building materials give off dangerous gases
D．the air indoors is polluted, which is very harmful
2. Some kind of indoor pollution can be found in _______.
A．every old house B．every modern house
C．all kinds of houses D．all kinds of offices
3. The indoor air pollution is caused by ______.
A．the man-made building materials and the limit of air-flow
B．the building way that the builders want to save energy
C．the building things that are made of man-made materials
D．the limit of the flow of air between inside and outside
4. The reason why we should use different kinds of plants to clean the air is that ______.
A．plants can let out all kinds of pollutants indoors
B．plants may take in more oxygen which people need
C．plants can make our houses prettier and more healthy
D．plants can absorb all kinds of harmful indoor chemicals
高三英语阅读理解中等难度题查看答案及解析
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For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.
Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants(污染物) can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.
People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.
As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building--green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.
1.Generally speaking, indoor air pollution may be more harmful than the air outside because________.
A. indoor air pollution can often make people seriously ill
B. there may be more harmful gases outside the buildings
C. the air indoors is polluted, which is very harmful
D. man-made building materials give off dangerous gases
2.Some kind of indoor pollution can be found in _______.
A. every modern house B. every old house
C. all kinds of houses D. all kinds of offices
3.The indoor air pollution is caused by ______.
A. the building way that the builders want to save energy
B. the man-made building materials and the limit of air-flow
C. the building things that are made of man-made materials
D. the limit of the flow of air between inside and outside
4.The reason why we should use different kinds of plants to clean the air is that ______.
A. plants can let out all kinds of pollutants indoors
B. plants may take in more oxygen which people need
C. plants can absorb all kinds of harmful indoor chemicals
D. plants can make our houses prettier and more healthy
高三英语阅读理解中等难度题查看答案及解析
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For years scientists have been concerned about the effects of air pollution on the earth's natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.
Indoor air pollution can cause a person to feel tired,to suffer eye pain, headache and other problems.Some pollutants(污染物)can cause breathing disorders,diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.People began to notice the problem in the early 1970s.It is said that when builders began making houses and offices they did not want to waste energy.To do this,they built buildings that limited the flow of air between inside and outside.They also began using man-made building materials.These materials are now known to let out harmful gases.As the problem became more serious, scientists began searching for a way to deal with it.They discovered a natural pollution control system for building－green plants.Scientists do not really know how plants control air pollution.They believe that a plant's leaves absorb or take in the pollutants.In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots.Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square metres of space.Studies of different plants show that each absorbs different chemicals.So the most effective way to clean the air is to use different kinds of plants.Having green plants inside your house can make it a prettier and healthier place.
77.What is the topic of the passage?
A.Air pollution.
B.Green plants indoors.
C.Indoor air pollution.
D.Environment protecting.
78.What makes indoor air pollution more harmful than that of the air outside?
A.The limited flow of air indoors.
B.Man-made building materials.
C.Fewer green plants inside houses.
D.The energy-saving materials indoors.
79.The most effective way to clean the air is to use different kinds of plants because______.
A.they can make houses pettier and healthier
B.they may let out oxygen which people need
C.they can take in all kinds of indoor pollutants
D.they can absorb different harmful indoor chemicals
80.Which of the following is implied but NOT stated?
A.keep windows open and let fresh air in.
B.Scientists have a clear idea how plants control air pollution.
C.Oxygen is let out through the leaves and roots of the plants.
D.Green plants are a natural pollution control system for building.
高三英语阅读理解简单题查看答案及解析
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For years, scientists and others concerned about climate change have been talking about the need for carbon capture and storage (CCS).
That is the term for removing carbon dioxide(二氧化碳) from, say, a coal-burning power plant’s smokestack and pumping it deep underground to keep it out of the atmosphere, where it would otherwise contribute to global warming.
However, currently, only one power plant in Canada captures and stores carbon on a commercial scale (and it has been having problems). Among the concerns about storage is that carbon dioxide in gaseous or liquid form that is pumped underground might escape back to the atmosphere. So storage sites would have to be monitored, potentially for decades or centuries.
But scientists at Lamont-Doherty Earth Observatory at Columbia University and other institutions have come up with a different way to store CO2 that might eliminate that problem. Their approach involves dissolving the gas with water and pumping the resulting mixture — soda water, essentially — down into certain kinds of rocks, where the CO2 reacts with the rock to form a mineral called calcite(方解石). By turning the gas into stone, scientists can lock it away permanently. Volcanic rocks called basalts(玄武岩) are excellent for this process, because they are rich in calcium, magnesium and iron, which react with CO2.
The project called CarbFix started in Iceland, 2012, when the scientists pumped about 250 tons of carbon dioxide, mixed with water, about 1,500 feet down into porous basalt. Early signs were encouraging: The scientists found that about 95 percent of the carbon dioxide was changed into calcite. And even more importantly, they wrote, the change happened relatively quickly — in less than two years.
“It’s beyond all our expectations,” said Edda Aradottir, who manages the project. Rapid change of the CO2 means that a project would probably have to be monitored for a far shorter time than a more conventional storage site.
There are still concerns about whether the technology will prove useful in the fight against global warming. For one thing, it would have to be scaled up enormously. For another, a lot of water is needed — 25 tons of it for every ton of CO2 — along with the right kind of rock.
But the researchers say that there is enough porous basaltic rock in Iceland, including in the ocean floors and along the margins of continents. And sitting a storage project in or near the ocean could potentially solve the water problem at the same time, as the researchers say seawater would work just fine.
1.What can we learn about CCS in Paragraphs 2 and 3?
A. Scientists believe global warming will be avoided if CO2 is pumped underground.
B. It’s been a common practice in many plants to capture and store CO2 underground.
C. There is no guarantee that CO2 will not escape even if pumped underground.
D. It requires decades to turn CO2 into liquid form and be locked underground.
2.What materials should be involved in the project CarbFix?
A. Water, CO2, soda water and basalts.
B. Water, CO2, a pump and basalts.
C. CO2, basalts, a pump and calcite.
D. Water, soda water, a pump and calcite.
3.According to Edda Aradottir, the result of the project was beyond the researchers’ expectations, because ________.
A. it’s disappointing to discover new problems caused by rapid change
B. it’s exciting to sense the problem of storing CO2 likely to be solved
C. it’s puzzling to find the encouraging but unexpected result of the project
D. it’s amazing to see 95% of the carbon dioxide turn into calcite that fast
4.What is the author’s purpose in writing the passage?
A. To show the different ways to fight against CO2.
B. To praise the efforts of scientists in storing CO2.
C. To inform us of a breakthrough in storing CO2.
D. To urge people to produce the least possible CO2.
高三英语阅读理解中等难度题查看答案及解析
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For some years the big drugmakers have been worrying about an approaching "patent cliff"—a fall in sales as the patents on their most popular pills expire or are struck down by legal challenges, with few new potential blockbusters to take their place. This week the patent on the best-selling drug in history expired—Lipitor, an anti-cholesterol pill which earned Pfizer nearly $11 billion in revenues last year.In all, pill like Lipitor with a combined $170 billion in annual sales will go off-patent by the end of 2015.
What is supposed to happen now is that lots of copycat firms rush in with "generic" (ie, chemically identical) versions of Lipitor at perhaps one-fifth of its price.Patients and health-care payers should reap the benefit.Pfizer's revenues should suffer. The same story will be repeated many times, as other best-selling drugs march over the patent cliff
But generics makers may face delays getting their cheaper versions to market.Ranbaxy, a Japanese-owned drugmaker, struggled to get regulators' approval for its generic version of Lipitor, and only won it on the day the patent expired.More importantly, research-based drug firms are using a variety of tactics to make the patent cliff slope more gently. Jon Leibowitz, chairman of America's Federal Trade Commission (FTC), is concerned by drugmakers filing additional patents on their products to put off the day when their protection expires.
Another tactic(策略) is "pay-for-delay", in which a drugmaker facing a legal challenge to its patent pays its would-be competitor to put off introducing its cheaper copy. In the year to October the FTC identified what it believes to be 28 such settlements. American and European regulators are looking into these deals. However, legal challenges against them have been delayed, and a bill to ban them is stuck in Congress.
To encourage generics makers to challenge patents on drugs, and introduce cheaper copies,
an American law passed in 1984 says that the first one to do so will get a 180-day exclusivity period,in which no other generics maker can sell versions of the drug in question, as Ranbaxy supposedly won with Lipitor.
However, Pfizer is exploiting a loophole(空子) in the 1984 law, which lets it appoint a second, authorised copycat—in this case, Watson, another American firm.According to BernsteinResearch, under the deal between the two drugmakers Pfizer will receive about 70% of Watson's revenues from its approved copy of Lipitor.More unusual, Pfizer has cut the price of its original version, and will keep marketing it vigorously. So Ranbaxy faces not one, but two competitors.
All this may raise Pfizer's sales by nearly $500m in the last half of 2015 compared with what they would otherwise have been, says Tim Anderson of BernsteinResearch, with revenues then falling after the 180 days are over. Others fear that Pfizer's tactics , if copied, will make the 180-day exclusivity period worth far less, and thus discourage generic firms from challenging patents in the first place.
1.The underlined word “blockbusters” in Paragraph 1 refers to “_______’
A. pills that sell very well
B. new patents to appear
C. drugmakers to compete with Pfizer
D. challenges which Pfizer has to face
2.What is the tactic mentioned in Paragraph 4?
A. Legal challenges against expired patents have been paid for putting off the cheaper copy.
B. Bills to prohibit generic makers have been stuck in Congress.
C. Drugmakers try to spend money delaying filing additional patents on popular pills
D. Patent-holders give possible competitors money to prevent more losses.
3.Pfizer exploit a loophole in the 1984 law mainly by ________.
A.marketing Lipitor more actively
B. making the price of Lipitor go up
C. cooperating with Watson to beat Ranbaxy
D. encouraging Watson to produce cheaper copies
4. How many tactics are adopted by patent-holders in the passage?
A. Two B. Three C. Four D. Five
5.Which of the following might be the best title for the passage?
A. Drugmakers’ struggle
B. Generic makers’ dilemma
C. Laws concerning patent protection
D. Popular pills of Pfizer
高三英语阅读理解中等难度题查看答案及解析
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Scientists have been interested for years in the observation that ratios(比率）of finger lengths differ in men and women. In men, the ring (fourth) finger is usually longer than the index (second); their so-called 2D :4D ratio is lower than 1. In females, the two fingers are more likely to be the same length. Because of this sex differences, some scientists believe that a low ratio could be a marker for higher prenatal hormone(产前激素）levels, although it’s not clear how the hormone might influence finger development. The 2D : 4D ratio has also been fingered in connection with brain-related characteristics—most often in males--such as depression, left-handedness, musical ability, and homosexuality.
In the latest such study, psychologist Mark Brosnan and colleagues at the University of Bath in the United Kingdom photocopied the hands of 74 boys and girls aged 6 and 7.They compared the measurements of the second and fourth fingers with the children's scores on a standard UK test of math and literacy. In boys, the lower the ratio, the better their math score, the team reports in the May issue of the British Journal of Psychology, The boys with the lowest ratios also were the ones whose abilities were most skewed in the direction of math rather than literacy. These differences are small but significant, says Brosnan. With the girls, there was no correlation between finger ration and numeracy, but those with higher ratios—probably indicating low hormone levels—had better scores on verbal abilities.
These sex-specific correlations show how tricky it is to define the roles of sex hormones, says psychologist S .Marc Breedlove of Michigan State University in East Lansing. The range of normal levels of the hormone is different in males and females, so comparable levels would have very different meanings depending on the sex of the individual. And the timing of hormone surges is as important as levels.
Nevertheless, Brosnan believes finger measurements might be useful for predicting cognitive abilities—although he acknowledges that “we are not suggesting that finger length measurements could replace SAT tests”. Others are more cautious, pointing out that scientists still have not confirmed that finger ratio is a reliable marker for prenatal hormone levels.
1.What can we learn from the first paragraph?
A. Scientists never show interest in people's fingers.
B. Many women have different kinds of fingers.
C. In males, the ring finger may equal the index in length.
D. In females, the ring finger may equal the index in length.
2.What is the author's attitude to Brosnan's research?
A. Supportive. B. Positive.
C. Neutral. D. Indifferent.
3.We can infer from the passage that .
A. in girls, the higher the ratio, the better their maths scores
B. finger length contributes to people's academic abilities
C. it is easy to give a definition of the roles of sex hormones
D. Brosnan is serious about his research
4.What's the main idea of this passage?
A. Finger ratio is critical to people's future.
B. Finger length measurements may be useful
C. Finger length is related to children’s scores.
D. Finger ratio is a reliable maker for hormone levels.
高三英语阅读理解困难题查看答案及解析
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For forty years scientists have been (好奇的) about that fish.
高三英语单词拼写简单题查看答案及解析
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For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.
Scientists are using powerful radio telescope to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan (扫视) the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.
Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution (进化) of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.
However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.
Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family in only about five billion years old, our galaxy is about 20 billions years old. In that time, some scientists think it is likely that civilizations are much more advanced than ours. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.
1.According to the passage, how many planets in our galaxy might be inhabitable?
A. 15 billion. B. 10 billion.
C. 5 billion D. 200 billion
2.The first paragraph in this passage is mainly about ________.
A. why scientists are looking for signs of life on other planets
B. how scientists are looking for signs of life on other planets
C. where scientists are looking for signs of life on other planets
D. when scientists are looking for signs of life on other planets
3.The underlined word “monitor” in the passage means “________”.
A. find B. follow
C. form D. check
4.Which of these statements is True based on the information in the passage?
A. Scientists are tying different ways to find signs of life on other planets.
B. Most scientists believe that there is intelligent life on other planets.
C. The earth is one of the oldest planets in our galaxy.
D. Scientists don’t believe that there might be life on other planets.
高三英语阅读理解中等难度题查看答案及解析
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For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.
Scientists are using powerful radio telescope to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan (扫视) the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.
Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution (进化) of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.
However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.
Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family in only about five billion years old, our galaxy is about 20 billions years old. In that time, some scientists think it is likely that civilizations are much more advanced than ours. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.
1.According to the passage, how many planets in our galaxy might be inhabitable?
A.15 billion. B.10 billion.
C.5 billion. D.200 billion
2.The first paragraph in this passage is mainly about ________.
A.why scientists are looking for signs of life on other planets
B.how scientists are looking for signs of life on other planets
C.where scientists are looking for signs of life on other planets
D.when scientists are looking for signs of life on other planets
3.The underlined word “monitor” in the passage means “________”.
A.find B.follow
C.form D.check
4.Which of these statements is True based on the information in the passage?
A.Scientists are tying different ways to find signs of life on other planets.
B.Most scientists believe that there is intelligent life on other planets.
C.The earth is one of the oldest planets in our galaxy.
D.Scientists don’t believe that there might be life on other planets.
高三英语阅读理解中等难度题查看答案及解析
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（重庆一中2016届高三5月模拟）For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.
Scientists are using powerful radio telescopes to listen to signals from about 1, 000 stars, all within 100 light years of earth. In addition, they will scan the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal they stands out from the background noise.
Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution of life. Based on the inhabitable（that can be lived in）planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.
However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.
Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family is only about five billion years old, our galaxy is about 20 billion years old. In that time, some scientists think it is likely that civilization much more advanced than ours have developed. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.
1.According to the passage, how many planets in our galaxy might be inhabitable?
A. 5 billion． B. 10 billion.
C. 15 billion. D. 200 billion
2.The first paragraph in this passage is mainly about ________ .
A. how scientists are looking for signs of life on other planets
B. why scientists are looking for signs of life on other planets
C. where scientists are looking for signs of life on other planets
D. when scientists are looking for signs of life on other planets
3.The underlined word “monitor” in the passage means“ ________ ”.
A. find B. imitate
C. check D. form
4.Which of these statements is true based on the information in the passage?
A. The earth is one of the oldest planets in our galaxy.
B. Most scientists believe that there is intelligent life on other planets.
C. Scientists are trying different ways to find signs of life on other planets.
D. Scientists don’t believe that there might be life on other planets.
高三英语阅读理解中等难度题查看答案及解析