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共用题干
第二篇

Explorer of the Extreme Deep

Oceans cover more than two-thirds of our planet.Yet,just a small fraction of the underwater world has been explored.Now,Scientists at the Woods Hole Oceanographic Institution(WHOI)in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,325.5 feet).The new machine,known as a manned submersible or human-operated vehicle (HOV),will replace another one named Alvin which has an amazing record of discovery,playing a key role in various important and famous undersea expeditions.Alvin has been operating for 40 years but can go down only 4,500 meters(14,763.8 feet).It's about time for an upgrade,WHOI researchers say.
Alvin was launched in 1964.Since then,Alvin has worked between 200 and 250 days a year, says Daniel Fornari,a marine geologist and director of the Deep Ocean Exploration Institute at WHOI.During its lifetime,Alvin has carried some 12,000 people on a total of more than 3,000 dives.A newer,better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries,Fornari says.It might also make the job of exploration a little easier."We take so much for granted on land."Fornari says."We can walk around and see with our eyes how big things are.We can see colors,special arrangements."
Size-wise,the new HOV will be similar to Alvin.It'll be about 37 feet long. The setting area inside will be a small sphere,about 8 feet wide,like Alvin.It'll carry a pilot and two passengers.It will be just as maneuverable.In most other ways,it will give passengers more opportunities to enjoy the view,for one thing. Alvin has only three windows,the new vehicle will have five,with more overlap so that the passengers and the pilot can see the same thing.
Alvin can go up and down at a rate of 30 meters every second,and its maximum speed is 2 knots(about 2.3 miles per hour),while the new vehicle will be able to ascend and descend at 44 meters per second.It'll reach speeds of 3 knots,or 3.5 miles per hour.

“…a world that is still full of mysteries"refers to_______.
A:the earth
B:out space
C:the ocean
D:Mars

参考答案

参考解析
解析：短文第一段的第四、五句提供了答案。
文章第一段从第三句开始说，科学家正在研制一艘可将研究人员带到 6 500米深处的潜水装置，而它将替代Alvin，因为Alvin只能潜到4 500米深处。选项A不是事实，所以是正确选择。
本文讨论探索海底世界的潜水装置，所以“充满神秘色彩的世界”指的就是海洋。
第三段的头三个句子告诉我们，HOV和Alvin在形状上和大小上相似。所以选项D是正确的。
第三段最后两句告诉我们，Alvin只有3个玄窗，而HOV有5个。最后一段告诉我们，两艘潜水装置的上下活动速度和行进速度有所差别。所以D选项是正确的。
更多 “共用题干 第二篇Explorer of the Extreme DeepOceans cover more than two-thirds of our planet.Yet,just a small fraction of the underwater world has been explored.Now,Scientists at the Woods Hole Oceanographic Institution(WHOI)in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,325.5 feet).The new machine,known as a manned submersible or human-operated vehicle (HOV),will replace another one named Alvin which has an amazing record of discovery,playing a key role in various important and famous undersea expeditions.Alvin has been operating for 40 years but can go down only 4,500 meters(14,763.8 feet).It's about time for an upgrade,WHOI researchers say.Alvin was launched in 1964.Since then,Alvin has worked between 200 and 250 days a year, says Daniel Fornari,a marine geologist and director of the Deep Ocean Exploration Institute at WHOI.During its lifetime,Alvin has carried some 12,000 people on a total of more than 3,000 dives.A newer,better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries,Fornari says.It might also make the job of exploration a little easier."We take so much for granted on land."Fornari says."We can walk around and see with our eyes how big things are.We can see colors,special arrangements."Size-wise,the new HOV will be similar to Alvin.It'll be about 37 feet long. The setting area inside will be a small sphere,about 8 feet wide,like Alvin.It'll carry a pilot and two passengers.It will be just as maneuverable.In most other ways,it will give passengers more opportunities to enjoy the view,for one thing. Alvin has only three windows,the new vehicle will have five,with more overlap so that the passengers and the pilot can see the same thing.Alvin can go up and down at a rate of 30 meters every second,and its maximum speed is 2 knots(about 2.3 miles per hour),while the new vehicle will be able to ascend and descend at 44 meters per second.It'll reach speeds of 3 knots,or 3.5 miles per hour.“…a world that is still full of mysteries"refers to_______. A:the earthB:out spaceC:the oceanD:Mars” 相关考题
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考题 共用题干 第二篇Explorer of the Extreme DeepOceans cover more than two-thirds of our planet.Yet,just a small fraction of the underwater world has been explored.Now,Scientists at the Woods Hole Oceanographic Institution(WHOI)in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,325.5 feet).The new machine,known as a manned submersible or human-operated vehicle (HOV),will replace another one named Alvin which has an amazing record of discovery,playing a key role in various important and famous undersea expeditions.Alvin has been operating for 40 years but can go down only 4,500 meters(14,763.8 feet).It's about time for an upgrade,WHOI researchers say.Alvin was launched in 1964.Since then,Alvin has worked between 200 and 250 days a year, says Daniel Fornari,a marine geologist and director of the Deep Ocean Exploration Institute at WHOI.During its lifetime,Alvin has carried some 12,000 people on a total of more than 3,000 dives.A newer,better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries,Fornari says.It might also make the job of exploration a little easier."We take so much for granted on land."Fornari says."We can walk around and see with our eyes how big things are.We can see colors,special arrangements."Size-wise,the new HOV will be similar to Alvin.It'll be about 37 feet long. The setting area inside will be a small sphere,about 8 feet wide,like Alvin.It'll carry a pilot and two passengers.It will be just as maneuverable.In most other ways,it will give passengers more opportunities to enjoy the view,for one thing. Alvin has only three windows,the new vehicle will have five,with more overlap so that the passengers and the pilot can see the same thing.Alvin can go up and down at a rate of 30 meters every second,and its maximum speed is 2 knots(about 2.3 miles per hour),while the new vehicle will be able to ascend and descend at 44 meters per second.It'll reach speeds of 3 knots,or 3.5 miles per hour.Which of the following statements is NOT a fact about Alvin?A:It can carry explorers as deep as 6,500 meters.B:It has played a key role in various important undersea expeditions.C:It was launched in the sixties of the twentieth century.D:It has been used for more than 40 years.
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考题 共用题干 第二篇Explorer of the Extreme DeepOceans cover more than two-thirds of our planet.Yet,just a small fraction of the underwater world has been explored.Now,Scientists at the Woods Hole Oceanographic Institution(WHOI)in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,325.5 feet).The new machine,known as a manned submersible or human-operated vehicle (HOV),will replace another one named Alvin which has an amazing record of discovery,playing a key role in various important and famous undersea expeditions.Alvin has been operating for 40 years but can go down only 4,500 meters(14,763.8 feet).It's about time for an upgrade,WHOI researchers say.Alvin was launched in 1964.Since then,Alvin has worked between 200 and 250 days a year, says Daniel Fornari,a marine geologist and director of the Deep Ocean Exploration Institute at WHOI.During its lifetime,Alvin has carried some 12,000 people on a total of more than 3,000 dives.A newer,better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries,Fornari says.It might also make the job of exploration a little easier."We take so much for granted on land."Fornari says."We can walk around and see with our eyes how big things are.We can see colors,special arrangements."Size-wise,the new HOV will be similar to Alvin.It'll be about 37 feet long. The setting area inside will be a small sphere,about 8 feet wide,like Alvin.It'll carry a pilot and two passengers.It will be just as maneuverable.In most other ways,it will give passengers more opportunities to enjoy the view,for one thing. Alvin has only three windows,the new vehicle will have five,with more overlap so that the passengers and the pilot can see the same thing.Alvin can go up and down at a rate of 30 meters every second,and its maximum speed is 2 knots(about 2.3 miles per hour),while the new vehicle will be able to ascend and descend at 44 meters per second.It'll reach speeds of 3 knots,or 3.5 miles per hour.In what aspects are the new HOV and Alvin different?A:Offering better views.B:Speed.C:Size.D:Both A and B.
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考题 共用题干 Global WarmingFew people now question the reality of global warming and its effects on the world's climate. Many scientists1the blame for recent natural disasters on the increase2the world's temperatures and are convinced that,more than3before,the Earth is at4from the forces of the wind,rain and sun.5to them,global warming is making extreme weather events,6as hurricanes and droughts,even more7and causing sea levels all around the world to8.Environmental groups are putting9on governments to take action to reduce the 10 of carbon dioxide which is given 11 by factories and power plants,thus attacking the problem at its source. They are in12of more money being spent on research into so-lar,wind and wave energy devices,which could then replace existing power13.Some scientists,14believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow,we would have to wait15hundred years to notice the results. Global warming,it seems,is here to stay.6._________A: such B: just C: even D: well
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考题 共用题干 第二篇Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people.An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre- vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs oftoday and tomorrow. This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment,which was about $10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the 1980s,more than 20 million have died of AIDS,mostly in poor countries.AIDS treatment programs may also result in___________.A:better drugsB:lower yearly costC:more effective preventionD:greater emphasis on treatment
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考题 共用题干 第二篇Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people.An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre- vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs oftoday and tomorrow. This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment,which was about $10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the 1980s,more than 20 million have died of AIDS,mostly in poor countries.According to Lee,our response to the AIDS disease is__________.A:a matter of great significance B:a matter of little significanceC:overemphasizedD:timely
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考题 共用题干 第二篇Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people.An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre- vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs oftoday and tomorrow. This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment,which was about $10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the 1980s,more than 20 million have died of AIDS,mostly in poor countries.How many people have died of AIDS so far?A:36 million.B:46 million.C:Around 440, 000.D:More than 20 million.
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考题 共用题干 Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people?An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the? 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre-vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said."By tackling it decisively we will also be building health systems that can meet the health needs of today and tomorrow.This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer.The annual cost of treatment,which was about$10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the l980s,more than 20 million have died of AIDS,mostly in poor countries?According to Lee,our response to the AIDS disease isA:a matter of great significance B:a matter of little significanceC:overemphasized D:timely
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考题 共用题干 Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people?An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the? 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre-vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said."By tackling it decisively we will also be building health systems that can meet the health needs of today and tomorrow.This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer.The annual cost of treatment,which was about$10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the l980s,more than 20 million have died of AIDS,mostly in poor countries?Which is true of many AIDS sufferers in developing countries?A:They put too little emphasis on treatment.B:They are not receiving any treatment.C:They refuse to be treated.D:They live longer than those in developed countries.
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考题 共用题干 Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people?An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the? 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre-vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said."By tackling it decisively we will also be building health systems that can meet the health needs of today and tomorrow.This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer.The annual cost of treatment,which was about$10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the l980s,more than 20 million have died of AIDS,mostly in poor countries?How many people have died of AIDS so far?A:36 million. B:46 million.C:Around 440,000. D:More than 20 million.
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考题 共用题干 第二篇Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people.An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre- vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs oftoday and tomorrow. This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment,which was about $10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the 1980s,more than 20 million have died of AIDS,mostly in poor countries.Which is true of many AIDS sufferers in developing countries?A:They put too little emphasis on treatment.B:They are not receiving any treatment.C:They refuse to be treated.D:They live longer than those in developed countries.
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考题 共用题干 第二篇Need for Emphasis on TreatmentAIDS programs in developing countries put too little emphasis on treatment,the World Health Organization said Tuesday,asking for more small community-based clinics to be opened to treat HIV-infected people.An estimated 36 million to 46 million people are living with AIDS,two-thirds of them in Africa,but only 440,000 people in developing countries were receiving treatment by the end of 2003,the UN health agency said in its annual report."Without treatment,all of them will die a premature and in most cases painful death,"the WHO said in the 169-page World Health Report.WHO Director General Lee Jong-wook said community-based treatment should be added to disease pre- vention and care for sufferers in AIDS programs."Future generations will judge our time in large part by our response to the AIDS disease,"Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs oftoday and tomorrow. This is a historic opportunity we cannot afford to miss,"he added.Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment,which was about $10,000 when the drugs were first developed,has dropped to about$150.Treatment programs also help AIDS prevention efforts,the report said,citing great demands for testing and counseling where treatment has been made available.Good counseling in turn leads to more effective prevention in those who are uninfected,and significantly reduces the potential for HIV carriers to pass on the infection,the report said.Since its discovery in the 1980s,more than 20 million have died of AIDS,mostly in poor countries.The WHO publishes its World Health Report__________.A:once every two yearsB:once a decadeC:once a yearD:twice a year
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考题 共用题干 Lakes,Too,Feel Global WarmingThere's no doubt;In the last few decades,the average temperature on Earth has been higher than it hasbeen in hundreds of years,Around the world,people are starting to measure the effects of global warming一 and trying to figure out what to do about it.Scientists recently used satellites to study the temperatures of lakes around the world,and they found that lakes are heating up.Between 1985 and 2009,satellites recorded the nighttime temperatures of the sur- faces of 167 lakes.During those 24 years,the lakes got warmer一by an average of about 0.045 degreeCelsius per year.In some places,lakes have been warming by as much as 0.10 degree Celsius per year. At that rate,a lake may warm by a full degree Celsius in just 10 years?That difference may seem imull一you might not even notice it in your bath.But in a lake,slightly warmer temperatures could mean more algae（水藻）,and algae can make the lake poisonous（有毒的）to fish.The study shows that in some regions,lakes are warming faster than the air around them.This is impor- tant because scientists often use measurements of air temperature to study how Earth is warming.By using lake temperatures as well,scientists can get a better picture of global warming.The scientists say data on lakes give scientists a new way to measure the impact of climate change around the world.That’s going to be useful,since no country is too big or too small to ignore climate change.Scientists aren't the only ones concerned、 Everyone who lives on Earth is going to be affected by the rapid warming ofthe planet.Many world leaders believe we might be able to do something about it,especially by reducing the amount of greenhouse（温室）gases we put into the air.That’s why the United Nations started the F'ramework Convention on Climate Change,or UNFCCC. Every year the convention meets,and representatives from countries around the world gather to talk about climate change and discuss global solutions to the challenges of a warming world.Scientists generally focus on air temperatures when studying global warming.A:Right B:WrongC:Not mentioned
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考题 共用题干 第一篇Arctic MeltEarth’s North and South Poles are famous for being cold and icy.Last year,however,the amnount of ice in the Arctic Ocean（北冰洋）fell to a record low.Normally,ice builds in Arctic waters around the North Pole each winter and shrinks（缩小）during the summer. But for many years,the amount of ice left by the end of summer has been declining.Since 1979,each decade has seen an 11.4 percent drop in end?of-summer ice cover. Between 1981 and 2000,ice in the Arctic lost 22 percent of its thickness,becoming I.13 meters thinner.Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low,which was set just 2 years ago. This continuing trend has made scientists concerned.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer（海洋学家）at the University of Washington at Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic,leaving a large area of thin ice and open water.Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5℃warmer than average and 1.5℃warmer than the previous record high.With both air and water getting warmer,the ice is melting from both above and below. In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 centimeters by season's end.The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice covcrfrom above,says Donald K. Perovich,a geophysicist at the U.S.Army Cold Regions Researchand Engineering Laboratory in Hanover,N.H.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.By the end of summer 2007 the ice cover in the Arctic was ________.A:4.2 million square kilometersB:11.4 million square kilometersC:1.13 million square kilometers D:38 million square kilometers
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考题 共用题干 第一篇Arctic MeltEarth’s North and South Poles are famous for being cold and icy.Last year,however,the amnount of ice in the Arctic Ocean（北冰洋）fell to a record low.Normally,ice builds in Arctic waters around the North Pole each winter and shrinks（缩小）during the summer. But for many years,the amount of ice left by the end of summer has been declining.Since 1979,each decade has seen an 11.4 percent drop in end?of-summer ice cover. Between 1981 and 2000,ice in the Arctic lost 22 percent of its thickness,becoming I.13 meters thinner.Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low,which was set just 2 years ago. This continuing trend has made scientists concerned.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer（海洋学家）at the University of Washington at Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic,leaving a large area of thin ice and open water.Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5℃warmer than average and 1.5℃warmer than the previous record high.With both air and water getting warmer,the ice is melting from both above and below. In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 centimeters by season's end.The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice covcrfrom above,says Donald K. Perovich,a geophysicist at the U.S.Army Cold Regions Researchand Engineering Laboratory in Hanover,N.H.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.It can be learned from the last sentence that _________.A:the ice melt in the Arctic may never stopB:scientists are trying hard to stop the ice melt in the ArcticC:scientists are delighted to find out what is going on in the ArcticD:the warming trend in the Arctic can be reversed in the near future
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考题 共用题干 第一篇Arctic MeltEarth’s North and South Poles are famous for being cold and icy.Last year,however,the amnount of ice in the Arctic Ocean（北冰洋）fell to a record low.Normally,ice builds in Arctic waters around the North Pole each winter and shrinks（缩小）during the summer. But for many years,the amount of ice left by the end of summer has been declining.Since 1979,each decade has seen an 11.4 percent drop in end?of-summer ice cover. Between 1981 and 2000,ice in the Arctic lost 22 percent of its thickness,becoming I.13 meters thinner.Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low,which was set just 2 years ago. This continuing trend has made scientists concerned.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer（海洋学家）at the University of Washington at Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic,leaving a large area of thin ice and open water.Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5℃warmer than average and 1.5℃warmer than the previous record high.With both air and water getting warmer,the ice is melting from both above and below. In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 centimeters by season's end.The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice covcrfrom above,says Donald K. Perovich,a geophysicist at the U.S.Army Cold Regions Researchand Engineering Laboratory in Hanover,N.H.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.The Beaufort Sea mentioned in Paragraph 7 is an example to show_________. A:how acetirate the new measurements areB:how thick the ice is in itC:how serious the problem of the ice melt in the Arctic isD:how dangerous it is to travel to it
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考题 共用题干 第一篇Arctic MeltEarth’s North and South Poles are famous for being cold and icy.Last year,however,the amnount of ice in the Arctic Ocean（北冰洋）fell to a record low.Normally,ice builds in Arctic waters around the North Pole each winter and shrinks（缩小）during the summer. But for many years,the amount of ice left by the end of summer has been declining.Since 1979,each decade has seen an 11.4 percent drop in end?of-summer ice cover. Between 1981 and 2000,ice in the Arctic lost 22 percent of its thickness,becoming I.13 meters thinner.Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low,which was set just 2 years ago. This continuing trend has made scientists concerned.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer（海洋学家）at the University of Washington at Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic,leaving a large area of thin ice and open water.Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5℃warmer than average and 1.5℃warmer than the previous record high.With both air and water getting warmer,the ice is melting from both above and below. In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 centimeters by season's end.The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice covcrfrom above,says Donald K. Perovich,a geophysicist at the U.S.Army Cold Regions Researchand Engineering Laboratory in Hanover,N.H.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.What are the reasons for the ice melting according to the scientists?A:Strong winds and clear skits.B:Longer summers and shorter winters.C:Open water and thin ice.D:Heavy clouds and light winds.
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考题 共用题干 Lakes,Too,Feel Global WarmingThere's no doubt;In the last few decades,the average temperature on Earth has been higher than it hasbeen in hundreds of years,Around the world,people are starting to measure the effects of global warming一 and trying to figure out what to do about it.Scientists recently used satellites to study the temperatures of lakes around the world,and they found that lakes are heating up.Between 1985 and 2009,satellites recorded the nighttime temperatures of the sur- faces of 167 lakes.During those 24 years,the lakes got warmer一by an average of about 0.045 degreeCelsius per year.In some places,lakes have been warming by as much as 0.10 degree Celsius per year. At that rate,a lake may warm by a full degree Celsius in just 10 years?That difference may seem imull一you might not even notice it in your bath.But in a lake,slightly warmer temperatures could mean more algae（水藻）,and algae can make the lake poisonous（有毒的）to fish.The study shows that in some regions,lakes are warming faster than the air around them.This is impor- tant because scientists often use measurements of air temperature to study how Earth is warming.By using lake temperatures as well,scientists can get a better picture of global warming.The scientists say data on lakes give scientists a new way to measure the impact of climate change around the world.That’s going to be useful,since no country is too big or too small to ignore climate change.Scientists aren't the only ones concerned、 Everyone who lives on Earth is going to be affected by the rapid warming ofthe planet.Many world leaders believe we might be able to do something about it,especially by reducing the amount of greenhouse（温室）gases we put into the air.That’s why the United Nations started the F'ramework Convention on Climate Change,or UNFCCC. Every year the convention meets,and representatives from countries around the world gather to talk about climate change and discuss global solutions to the challenges of a warming world.Scientists have been keeping records of lake temperatures for over 30 years.A:Right B:WrongC:Not mentioned
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考题 共用题干 Lakes,Too,Feel Global WarmingThere's no doubt;In the last few decades,the average temperature on Earth has been higher than it hasbeen in hundreds of years,Around the world,people are starting to measure the effects of global warming一 and trying to figure out what to do about it.Scientists recently used satellites to study the temperatures of lakes around the world,and they found that lakes are heating up.Between 1985 and 2009,satellites recorded the nighttime temperatures of the sur- faces of 167 lakes.During those 24 years,the lakes got warmer一by an average of about 0.045 degreeCelsius per year.In some places,lakes have been warming by as much as 0.10 degree Celsius per year. At that rate,a lake may warm by a full degree Celsius in just 10 years?That difference may seem imull一you might not even notice it in your bath.But in a lake,slightly warmer temperatures could mean more algae（水藻）,and algae can make the lake poisonous（有毒的）to fish.The study shows that in some regions,lakes are warming faster than the air around them.This is impor- tant because scientists often use measurements of air temperature to study how Earth is warming.By using lake temperatures as well,scientists can get a better picture of global warming.The scientists say data on lakes give scientists a new way to measure the impact of climate change around the world.That’s going to be useful,since no country is too big or too small to ignore climate change.Scientists aren't the only ones concerned、 Everyone who lives on Earth is going to be affected by the rapid warming ofthe planet.Many world leaders believe we might be able to do something about it,especially by reducing the amount of greenhouse（温室）gases we put into the air.That’s why the United Nations started the F'ramework Convention on Climate Change,or UNFCCC. Every year the convention meets,and representatives from countries around the world gather to talk about climate change and discuss global solutions to the challenges of a warming world.Global warming is less threatening to small countries.A: RightB:WrongC: Not mentioned
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考题 问答题练习14　　Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual.
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考题 单选题Which of the following is true about the U.S. Navy underwater listening net-work?A It is now partly accessible to civilian scientists.B It has been replaced by a more advanced system.C It became useless to the military after the cold war.D It is indispensable in protecting endangered species.
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