听力原文： Scientists say they can tell what air and sea cond..

第1题

听力原文：Scientists say they can tell what air and sea conditions were like hundreds of th

听力原文： Scientists say they can tell what air and sea conditions were like hundreds of thousands of years ago. They say pieces of ice taken from Greenland provide such information.

Scientists took the ice from more than one-and-a-half mile deep in huge masses of ice that float on the sea. That is the deepest scientists ever have drilled for ice. The ice represents 25,000 years of history. It provides one of the clearest records of ancient weather.

European and American scientific teams have been studying ice from the same area to confirm each other's findings. The scientists examine the ice that was formed each year. They measure the oxygen and carbon dioxide in the ice. These measurements tell about the year's temperature.

From these measurements, the scientific teams say that the past 10,000 years is the only period during which the weather has not changed very much. Before that time, they believe very large, sudden changes in the weather were common. The ice appears to show that at some periods, Earth's weather changed from very hot to very cold in only ten years.

According to the news, the ice from Greenland provides information about

A．oxygen.

B．ancient weather.

C．carbon dioxide.

D．temperature.

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第2题

听力原文：Scientists say they can tell what air and sea conditions were like hundreds of th

听力原文： Scientists say they can tell what air and sea conditions were like hundreds of thousands of years ago. They say pieces of ice taken from Greenland provide such information. Scientists took the ice from more than one and a half miles deep in huge masses of ice that float on the sea. That is the deepest scientists have ever drilled for ice. The ice represent 25, 000 years of history. It provides one of the clearest records of ancient weather. European and American scientific teams have been studying ice from the same area to confirm each other's findings. The scientists examined the ice that was formed each year. They measured the oxygen and carbon dioxide in the ice. These measurements tell about the year's temperature. From these measurements the scientific teams say the past ten thousand years is the only period during which the weather has not changed very much. Before that time, they believed very large and sudden changes in the weather were common. The ice appears to show that at some periods Earth's weather changed from very hot to very cold in only ten years.

According to the news, the ice from Greenland provides information about

A．oxygen.

B．ancient weather.

C．carbon dioxide.

D．temperature.

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第3题

听力原文：Experts on dyslexia say that the problem is not a disease. They say that persons

听力原文： Experts on dyslexia say that the problem is not a disease. They say that persons with dyslexia use information in a different way. One of the world's greatest thinkers and scientists named Albert Einstein was dyslexic. Dr Einstein said that he never thought in words the way that most of us do. He said that he thought in pictures instead. Other famous people who suffered from dyslexia include Leonardo Da Vinci, a celebrated Roman artist, Thomas Edison, a well-Known American inventor and a former American Vice president, Nelson Rockfeller.

Dyslexia was first recognized in Europe and then in the United States over 80 years ago. Many years passed before doctors discovered that people with this disorder were not mentally slow or disabled. The doctors found that the brains of dyslexia persons are rather different. In brains of most people, the left side, the part that controls language, is larger than the fight side. In the people with dyslexia, the right side of the brain is much bigger. However, research has shown that dyslexia is more common in men than in women, and it is also found more often in people who are left-handed.

(30)

A．The left-handed women.

B．The left-handed men.

C．Excellent female scientists or artists.

D．Some celebrated female presidents.

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第4题

听力原文：With the development of science, scientists have discovered more about the world.

听力原文： With the development of science, scientists have discovered more about the world. Scientists say world coastal areas must prepare now for a rise in sea levels. No matter what action is taken, scientists say there are already enough greenhouse gases in the atmosphere to cause a major warning. As a result, scientists and government officials are focusing on how society might adapt to rising sea levels, changing agricultural zones, changing climates and other problems.

Already, state and local governments along the coast of the United States are starting to plan for a possible longterm rise in the sea level, and a few have taken action to cope with it. Agricultural researchers are developing heat-resistant and draught-resistant crops that might replace traditional crops if the climate changes. How long it will take for maximum warming to be reached is uncertain because the oceans slow such warming. Most scientists expect the maximum warming to take place by the second half of this century.

If levels of greenhouse gases in the atmosphere double, sea levels will rise; estimates of the average rise are from 1.5 feet to 6.5 feet. Some leading experts expect a rise of I meter, a little more than three feet.

(33)

A．Pollution of coastal areas.

B．Rise in sea levels.

C．Exhaustion of sea resources.

D．Earthquakes and volcanoes.

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第5题

听力原文： Scientists say they can tell what air and sea conditions were like hundreds of t

housands of years ago. They say pieces of ice taken from Greenland provide such information.

Scientists took the ice from more than 1.5 -mile deep in huge masses of ice that float on the sea. The ice represents 25,000 years of history. It provides one of the clearest records of ancient weather.

European and American scientific teams have been studying ice from the same area to confirm each other's findings. They measured the oxygen and carbon dioxide in the ice for the temperature. From these measurements, the scientific teams say that the past 10,000 years is the only period during which temperature has not changed very much.

According to the news, ice from Greenland gives information about

A．oxygen.

B．ancient weather.

C．carbon dioxide.

D．temperature.

点击查看答案

第6题

听力原文： Scientists say they can tell what air and sea conditions were like hundreds of t

housands of years ago.They say pieces of ice taken from Greenland provide such information.

Scientists took the ice from more than 1.5 miles deep in huge masses of ice that float on the sea. The ice represents 25,000 years of history. (23[B])It provides one of the clearest records of ancient weather.

(24[C])European and American scientific teams have been studying ice from the same area to confirm each other's findings. They measured the oxygen and carbon dioxide in the ice for the temperature. From these measurements, (25[D])the scientific teams say that the past 10,000 years is the only period during which temperature has not changed very much.

According to the news, ice from Greenland gives information about ______.

A．oxygen

B．ancient weather

C．carbon dioxide

D．temperature

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第7题

听力原文：Scientists in many developing nations are studying a way to protect and control t

听力原文： Scientists in many developing nations are studying a way to protect and control the use of forests, fishing water, grasslands and other resources. They call the system "common property". It means that people join together to abate and protect the resources. Scientists say that increased population is damaging the world resources. Too many trees are cut; grasslands and croplands are destroyed. Too many fish are taken from the fishing area. There are two traditional ways to deal with this situation. One is public: the government agency decides who may use the resources and when; or the property can be private: the owner decides how to protect the resources. Experts say these two methods often are not effective, however. They believe there is a third possibility that is neither completely governmental nor completely private. It is communal or joint control of the resources.

Scientists know that this idea of common property is not new. The system has been believed successful for a long time by groups in many countries. In South Asia, some villagers have governing systems to protect everyone's right to irrigation water. In part of Central Africa, there are traditional rules that banned the killing of some wild animals. Farmers in Syria have a system to share grasslands and fisherman in Turkey have a system to make sure no one takes too many fish. Scientists say such systems usually were developed by small groups to deal with limited problems. Rules are simple and the enforcement is based on traditional value and ways of doing things. Scientists believe such systems also would be effective in other situations. They are studying how it might produce more cooking rules for people in Indian villages. The scientific group in Costa Rice is studying common property to control land area. And a government group in Zimbabwe is studying the system to protect wild animals. Scientists do not say the common property system will solve all resource needs in developing nations, buy they believe it provides one important way to deal with the problem.

(33)

A．Property owned by a group of people.

B．Privately-owned property.

C．Government-owned property.

D．People's joint effort to share and protect natural resources.

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第8题

听力原文：American scientists have found that some birds are more intelligent than experts

听力原文： American scientists have found that some birds are more intelligent than experts had originally believed. The scientists say birds have abilities that involve communication and different kinds of memory. In some unusual cases, their abilities seem better than those of humans.

Griffin is a Grey parrot. He lives in his laboratory at the Massachusetts Institute of Technology in Cambridge. Griffin can arrange objects in order of size. He can also combine words in the right order. For example, he will combine words when asking for a piece of food.

Some birds have other memory skills. For example, they collect and store thousands of seeds in autumn, and find them later in winter. These birds use natural objects to find the seeds they have stored. They use at least three objects, such as rocks or trees, to find the stored seeds.

A jay can be trained to choose one object instead of another. The bird uses this skill to receive a prize, such as food.Scientists also say some birds can learn as many as two thousand different songs. They say songs may have developed as a way for birds to communicate with other birds.

Scientists believe that birds must have a special guidance system in their brain. Understanding how a bird's brain operates may help us better understand how a human brain processes information.

(26)

A．Talking.

B．Communication and memory.

C．Singing.

D．Finding the way.

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第9题

听力原文：American researchers say cutting down trees in snow regions might help counter th

听力原文： American researchers say cutting down trees in snow regions might help counter the effects of global warming. The findings highlight the complexity of the planet as it'd previously been understood that mass deforestation contributed to global warming. It's been a woe cry for environmentalists in recent years "Mass deforestation contributes to global warming." But that argument may now have to be revised. Scientists in the United States have run a simulation of the effects of large-scale clearing. And they find that if trees were to be cut down in the icy northern regions, it would actually cool down the Earth. The reason: snow reflects sunlight and the great pine forests of Russia, Europe and Canada shade tens of thousands of hectares of reflective snow.

What might help control global warming according to American researchers？

A．Planting more trees.

B．Cutting down trees in snow regions.

C．Melting snow.

D．Growing flowers of a certain species.

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第10题

听力原文：Scientists say they have proven what they have long suspected about HIV, the viru

听力原文： Scientists say they have proven what they have long suspected about HIV, the virus that causes the disease AIDS. They found that an infected person who has a low amount of HIV in the blood is less likely to pass the virus to someone of the opposite sex.

The study is the largest ever to examine the link between viral level in a person’s blood and the risk of passing HIV through sex. The findings suggest that reducing the amount of the virus in a person’s blood may be one way to slow the rate of AIDS infections. The researchers found that having other sexually transmitted diseases did not affect the risk for HIV. The amount of virus in the blood did affect the risk for HIV.

Experts say the Ugandan study may lead to new treatments to prevent the spread of HIV. But the study has caused criticism about the way AIDS research is carried out. Doctor Marcia Angell, the editor of the blew England Journal of Medicine that published the study, says the HIV-infected people in the study should have been offered anti-viral drugs that are given in industrial countries. She and other people fear that AIDS research is carried out unfairly in poor countries.

Which of the following statements is TRUE according to the passage？

A．Scientists have developed a new drag to kill HIV virus.

B．Scientists have found a new treatment to prevent the spread of HIV.

C．Scientists have proven that HIV does cause the disease AIDS.

D．Scientists have found that the amount of virus in the blood affect the risk for HIV.

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