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根据以下材料，回答题More about Alzheimer"s DiseaseScientists have developed skin tests that

根据以下材料，回答题

More about Alzheimer"s Disease

Scientists have developed skin tests that may be used in the future to identify people with Alzheimer"s diseasel and may ultimately allow physicians to predict 51_______ is at risk of getting this neurological disorder.

The only current means of 52_______ the disease in a living patient is a long and expensive series of tests that eliminate every other cause of dementia.

"Since Alois Alzheimer described the 53_______ nearly a century .ago， people have been trying to find a way to 54_______ diagnose it in its early stages， " said Patricia Grady， acting director of the National Institute of Neurological Disorders and Stroke in Bethesda， Maryland. "This discovery， if 55_______ ， could prove a big step forward in our efforts to deal with and understand the disease. "

Alzheimer"s is the single greatest 56_______ of mental deterioration in older people， affecting between 2.5 million and 4 million people in the United States 57_______. The devastating disorder gradually destroys memory and the ability to function， and eventually causes death. There is currently no known 58_______ for the disease.

Researches 59_______ that the skin cells of Alzheimer"s patients have defects that interfere with their ability to regulate the flow of potassium in and out of the cells. The fact that the cell defects are present in the skin suggests that Alzheimer"s 60_______ from physiological changes throughout the body， and that dementia may be the first noticeable 61_______ of these changes as the defects affect the cells in the brain， scientists said.

The flow of potassium is especially critical in cells responsible for memory formation. The scientists also found two other defects that affect the cells" supply of calcium， another 62_______ element.

One test developed by researches calls 63_______ growing skin cells in a laboratory culture and then testing them with an electrical detector to determine if the microscopic tunnels that 64_______ the flow of potassium are open. Open potassium channels create a unique electrical signature.

A spokesman for the Alzheimer"s Association said that if the validity of the diagnostic test can be proven it would be an important 65_______， but cautioned that other promising tests for Aizheimer"s have been disappointing.

回答（51）题 查看材料

A.what

B.one

C.it

D.who

答案
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发布时间：2021-05-23
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更多“根据以下材料，回答题More about Alzheimer"s DiseaseScientists have developed skin tests that”相关的问题

第1题

根据以下材料，回答题。A Letter from Alan-I have learnt of a plan to build three hundred hous

根据以下材料，回答题。

A Letter from Alan-

I have learnt of a plan to build three hundred houses on the land called Parson"s Place by the football ground. Few people know about this new plan to increase the size of our town. For me， Parson"s Place is special because it is a beautiful natural area where local people can relax——the small wood has many unusual trees and the stream is popular with fishermen and bird-watchers. It"s very quiet because there are few houses or roads nearby. I think that losing this area will be terrible because we have no other similar facilities in the neigh bour hood.

I am also against this plan because it will cause traffic problems. How will the people from the new houses travel to work？ The motorway and the railway station are on the other side of town. There fore these people will have to drive through the town centre every time they go anywhere.

The roads will always be full of traffic， there will be nowhere to park and the tourists who come to see our lovely old buildings will leave. Shops and hotels will lose business. If the town really needs more homes，the empty ground beside the railway station is a more suitable place.

No doubt the builders will make a lot of money by selling these houses. But，in my opinion， the average person will quickly be made poorer by this plan. As well as this， we will lose a very special place and our town will be much less pleasant.

I am going to the local government offices on Monday morning to protest about this plan and I hope that your readers will join me there. We must make them stop this. plan before it is too late.

Why has Alan written this letter？ 查看材料

A.To persuade the government to build new houses.

B.To protest about a new motorway near the town.

C.To encourage more people in the town to use Parson"s Place.

D.，To inform. other people about the builders" plans.

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第2题

根据以下材料，回答题Influence from InternetThere can be no doubt at all that the Intemet ha

根据以下材料，回答题

Influence from Internet

There can be no doubt at all that the Intemet has made a huge difference to our lives. Parents are worried that children spend too much time playing on the Intemet， hardly ___________ （51） doing anything else in their spare time. Naturally， parents are ___________ （52） to find out why the Interact is so attractive， and they want to know if it can be ___________ （53） for their children. Should parents worry if their children are spending that much time ___________ （54） their computers？

Obviously; if children are bent over their computers for hours， ___________ （55） in some game，instead of doing their homework， then something is wrong. Parents and children could decide how much use the child should ___________ （56） of the Intemet and the child should give ___________ （57） to parents that it won"t interfere with homework. If the child is not ___________ （58 ） to this arrangement，the parent can take more drastic ___________ （59） dealing with a child"s use of the Intemet， which is not much ___________ （60） from any other sort of bargain about behaviour.

Any parent who is ___________ （61） alarmed about a child"s behaviour should make an appointment to ___________ （62） the matter with a teacher. Spending time in front of the screen does not ___________ （63） affect a child"s performance at school. Even ifa child is ___________ （64） crazy about using the Intemet， he or she is probably just ___________ （65） through a phase， and in a few months there will be something else to worry about!

回答（51）题 查看材料

A.always

B.rarely

C.never

D.ever

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第3题

根据以下材料，回答题School DegreesIn the past， degrees were very unusual in my family. I re

根据以下材料，回答题

School Degrees

In the past， degrees were very unusual in my family. I remember the day my uncle graduated. We had a huge party， and for many years my mother called him "the genius" and listened to his opinion. Today in comparison， five of my brothers and sisters have degrees， and two are studying for their masters". However， some people think that this increased access to education is devaluing degrees.

People have several arguments against the need for degrees. They say that having so many graduates devalues a degree. People lose respect for the degree holder. It is also claimed that education has become a rat race. Graduates have to compete for jobs even after years of studying.

Another point is that studying for such a long time leads to learners becoming inflexible. They know a lot about one narrow subject， but are unable to apply their skills. Employers prefer more flexible and adaptable workers.

However， I feel strongly that this move to having more qualifications is a positive development. In the past education was only for the rich; and powerful. Now it is available to everyone， and this will have many advantages for the country and the individual. First of all， it is impossible to be overeducated. The more people are educated， the better the world will be， because people will be able to discuss and exchange ideas. A further point is that people with degrees have many more opportunities. They can take a wider variety of jobs and do what they enjoy doing，

instead of being forced to take a job they dislike. Finally， a highly educated workforce is good for the economy of the country. It attracts foreign investment.

In conclusion， although there are undoubtedly some problems with increased levels of education， I feel strongly that the country can only progress if all its people are educated to the maximum of their ability.

What can we learn about the author‘s family？ 查看材料

A.They used to disregard education.

B.They are overeducated now.

C.Few members were allowed to go to school in the past.

D.There are now more educated members than in the past.

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第4题

根据以下材料，回答题Car Crime1、 A million motorists leave their cars filled up with petrol

根据以下材料，回答题

Car Crime

1、 A million motorists leave their cars filled up with petrol and with the keys in the ignition every day.The cars are sitting in petrol stations while drivers pay for their fuel.The Automobile Association（AA）has discovered that cars are left unattended for an average three minutes and sometimes longer as drivers buy drinks，sweets，cigarettes and other consumer items.With payment of credit cards becoming more and more common，it is not unusual for a driver to be out of his car for as long as six minutes，providing the car theft with a golden opportunity.

2、 For more than ten years there has been a big rise in car crime than in most other types of crimes. An average of more than two cars a minute are broken into or stolen in the UK. Car crime accounts for almost a third of all reported offenses with no signs that the trend is slowing down.

3、 Although there are highly professional criminals involved in car theft， almost 90 percent of car theft is committed by the opportunists. Amateur thieves are aided by our own carelessness. The AA recommends locking up whenever you leave the car and for however short a period. A partially open sunroof or window is a further come-on to thieves.

4、 There are many other traps to avoid. The AA has found little awareness among drivers about safe parking. Most motorists questioned made no efforts to avoid parking in quiet spots-just the places thieves" love. The AA advises，drives to park in places with people around-thieves don"t like audiences.

Paragraph 1 查看材料

A.Safe parking

B.Increase in car theft

C.Opportunities for non-professionals

D.Anti-theft organizations

E.Drivers" earelessness:a factor in promoting ear stealing

F.Car stealing mostly by professional criminals

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第5题

根据以下材料，回答题Things to Know about the U.K.（1） From Buckingham Palace to Oxford， the

根据以下材料，回答题

Things to Know about the U.K.

（1） From Buckingham Palace to Oxford， the U.K. is loaded with wonderful icons （标志） of past eras. But it has also modernized with confidence. It"s now better known for vibrant （充满活力的） cities with great nightlife and attraction. Fashions， fine dining， clubbing， shopping—the U.K. is among the world"s best.

（2） Most people have strong preconceptions about the British. But if you"re one of these people，you"d be wise to abandon those ideas. Visit a nightclub in one of the big cities， a football match， or a good local pub and you might more readily describe the English people as humorous and hospitable. It"s certainly true that no other country in the world has more bird-watchers， sports supporters， pet owners and gardeners than the U.K.

（3） Getting around England is pretty easy. Budget （廉价的） airlines like Easyjet and Rynnair fly domestically. Trains can deliver you very efficiently from one major city to another. Long distance express buses are called coaches. Where coaches and btises run on the same route，coaches are more expensive （though quicker） than buses. London"s famous black cabs are excellent but expensive. Minicabs are cheaper competitors， with freelance （个体的） drivers.

But usually you need to give a call first. London"s underground is called the Tube. It"s veryconvenient and can get you to almost any part of the city.

（4） The U.K. is not famous for its food. But you still need to know some of the traditional English foods. The most famous must be fish and chips. The fish and chips are deep fried in flour.

English breakfast is something you need to try. It is fried bacon， sausages， flied eggs， black pudding， flied tomatoes， flied bread and baked beans， with toast and a pot of tea. Other things like shepherd"s pie and Yorkshire pudding are also well-known as a part of English food culture.

（5） Pubbing and clubbing are the main forms of English nightlife， especially for the young. Pubbing means going to a pub with friends， having drinks， and chatting. Clubbing is different from pubbing and includes going to a pub， or a place of music， or a bar， or any other places to gather with friends.

Clubbing can be found everywhere. Usually there is some kind of dress code for clubbing， such as no jeans， no sportswear， or smart clubwear， while pubbing is much more casual.

Paragraph 2__________ 查看材料

A.Education

B.People

C.Transport

D.Drinks

E.Food

F.Nightlife

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第6题

根据以下材料，回答题Living StandardsThe differences in living standards around the world ar

根据以下材料，回答题

Living Standards

The differences in living standards around the world are vast. In 1993， the average American had an income of about $25，000. In the same year， the average Mexican earned $7，000， and the average Nigerian earned $1，500. Not surprisingly， this large variation in average income is reflected in various measures of the quality of life. Changes in living standards over time are also large. In the United States， incomes have historically grown about 2 percent per year （after adjusting for changes in the cost of living）. At this rate， average income doubles every 35 years. In some countries， economic growth has been even more rapid. In Japan， for instance， average income has doubled in the past 20 years， and in South Korea it has doubled in the past 10 years.

What explains these large differences in living standards among countries and over time？ The answer is surprisingly simple. Almost all variation in living standards is attributable to differences in countries" productivity—— that is， the amount of goods and services produced from each hour of a worker"s time. In nations where workers can produce a large quantity of goods and services per unit of time， most people enjoy a high standard of living; in nations where workers are less productive， most people must endure a more meager existence. Similarly， the growth rate of a nation"s productivity determines the growth rate of its average income.

The fundamental relationship between productivity and living standards is simple， but its implications are far-reaching. If productivity is the primary determinant of living standards， other explanations must be of secondary importance. For example， people might think that labor unions or minimum-wage laws contributed to the rise in living standards of American workers over the past century. Yet the real hero of American workers is their rising productivity.

The relationship between productivity and .living standards also has great implications for public policy. When thinking about how any policy will affect living standards， the key question is how it will affect our ability to produce goods and services. To improve living standards，policymakers need to raise productivity by ensuring that workers are well educated， have the tools needed to produce goods and services， and have access to the best available technology.

Which of the following countries has enjoyed the fastest economic growth in history？ 查看材料

A.Mexico.

B.The United States.

C.Japan.

D.South Korea.

点击查看答案

第7题

根据内容回答题。 he Great Newspaper WarUp until about 100 years ago, newspapers in the Un

根据内容回答题。

he Great Newspaper War

Up until about 100 years ago, newspapers in the United States appealed only to the most se- rious readers. They used ________(51) illustrations and the articles were about politics or business.

Two men changed that-Joseph Pulitzer _______(52) The New York World and Randolph Hearst of The New York Journal. Pulitzer bought The New York World ________(53) 1883. He changed it from a traditional newspaper into a very _______(54)one overnight. He added_________(55) illustrations and cartoons. And he told his reporters to write articles on _______

(56) crime or scandal they could find. And they did. One of them even pretended she was crazy and then she ________(57)to a mental hospital. She then wrote a series of articles about the poor treatment of ________(58)in those hospitals.

In 1895, Hearst came to New York from (59) California. He wanted The Journal to be more sensational and more exciting __________(60) The World. He also wanted it to be ________(61), so he reduced the price by a penny. Hearst attracted attention because his headlines were bigger than ________(62). He often said, "Big print makes big news. "

Pulitzer and Hearst did anything they ________(63)to sell newspapers. For example,

Hearst sent Frederic Remington, the famous illustrator (64) pictures of the Spanish-A-merican War. When he got there, he told Hearst that no fighting was ________(65). Hearst answered, "You furnish the pictures. I&39;ll furnish the war. "

材料题请点击右侧查看材料问题 查看材料

A.no

B.many

C.a tot

D.little

点击查看答案

第8题

根据下面材料，回答题。 Exercise Lowers Employers&39; Health CostsCompanies can save millio

根据下面材料，回答题。

Exercise Lowers Employers&39; Health Costs

Companies can save millions in health-care costs simply by encouraging their employees to exercise a little bit, researchers reported on Friday.

They said obese (肥胖的) employees had higher health-care costs, but lowered those expenses by exercising just a couple of times a week, without even losing any weight.

Feifei Wang and colleagues at the University of Michigan studied 23,500 workers at General Motors.

They estimated that getting the most sedentary (惯于久坐的) obese workers to exercise would have saved about $790,000 a year, or about 1.5 percent of health-care costs for the whole group,Company-wide. The potential savings could reach $7.1 million per year, they reported in the Journal of Occupational and Environmental Medicine.

Of the whole group of workers, about 30 percent were of normal weight,45 percent were overweight (超重的), and 25 percent were obese. Annual health-care costs averaged $2,200 for normal weight, $2,400 for the overweight, and $2,700 for obese employees.

But among workers who did no exercise, health-care costs went up by at least $100 a year, and were $3,000 a year for obese employees who were sedentary.

But adding two or more days of light exercise, at least 20 minutes of exercise or workhard enough to increase heart rate and breathing, lowered costs by on average $500 per employee a year, the researchers found.

"This indicates that physical activity behavior. could reduce at least some of the harmful effects of excess body fat, and in consequence, help lower the health-care costs," Wang and colleagues wrote.

How can employees help lower the health-care costs？ 查看材料

A.By taking more rest

B.By eating less

C.By exercising a little bit

D.By saving more money

点击查看答案

第9题

根据以下材料，回答题。Some Things We Know About LanguageMany things about language are a my

根据以下材料，回答题。

Some Things We Know About Language

Many things about language are a mystery， and many will always remain so. But some things we do know.

First， we know that all human beings have a language of some sort. There is no race of men anywhere on earth so backward that it has no language， no set of speech sounds by which the people communicate with one another. Furthermore， in historical times， there has never been a race of men without a language.

Second， there is no such thing as a primitive language. There are many people whose cultures are undeveloped， who are， as we say， uncivilized， but the languages they speak are not primitive. In all known languages we can see complexities that must have been tens of thousands of years in developing.

This has not always been well understood; indeed， the direct contrary has often been stated.Popular ideas of the language of the American Indians will illustrate. Many people have supposed that the Indians communicated in a very primitive system of noises. Study has proved this to be nonsense. There are， or were， hundreds of American Indian languages， and all of them turn out to be very complicated and very old. They are certainly different from the languages that most of us are familiar with， but they are no more primitive than English and Greek.

A third thing we know about language is that all languages are perfectly adequate. That is，each one is a perfect means of expressing the culture of the people who speak the language.

Finally， we know that language changes. It is natural and normal for language to change ; the only languages which do not change are the dead ones. This is easy to understand if we look backward in time. Change goes on in all aspects of language. Grammatical features change as do speech sounds， and changes in vocabulary are sometimes very extensive and may occur very rapidly. Vocabulary is the least stable part of any language.

In the second paragraph the passage tells us that 查看材料

A.some backward race doesn"t have a language of its own

B.some race in history didn"t possess a language of its own

C.any human race， whether backward or not， has a language

D.some races on earth can communicate without language

点击查看答案

第10题

根据以下材料，回答题Living Standards Around the WorldThe differences in living standards ar

根据以下材料，回答题

Living Standards Around the World

The differences in living standards around the world are vast. In 1993， the average American had an income of about $25，000. In the same year， the average Mexican earned $7，000， and the average Nigerian earned $1，500. Not surprisingly， this large variation in average income is reflected in various measures of the quality of life. Changes in living standards over time are also large. In the United States， incomes have historically grown about 2 percent per year （after adjusting for changes in the cost of living）. At this rate， average income doubles every 35 years. In some countries， economic growth has been even more rapid. In Japan， for instance， average income has doubled in the past 20 years， and in South Korea it has doubled in the past 10 years.

What explains these large differences in living standards among countries and over time？ The answer is surprisingly simple. Almost all variation in living standards is attributable to differences in countries" productivity—— that is， the amount of goods and services produced from each hour of a worker"s time. In nations where workers can produce a large quantity of goods and services per unit of time， most people enjoy a high standard of living; in nations where workers are less productive， most people must endure a more meager existence. Similarly， the growth rate of a

nation"s productivity determines the growth rate of its average income.

The fundamental relationship between productivity and living standards is simple， but its implications are far-reaching. If productivity is the primary determinant of living standards， other explanations must be of secondary importance. For example， people might think that labor unions or minimum-wage laws contributed to the rise in living standards of American workers over the past century. Yet the real hero of American workers is their rising productivity.

The relationship between productivity and living standards also has great implications for public policy. When thinking about how any policy will affect living standards， the key question is how it will affect our ability to produce goods and services. To improve living standards，policymakers need to raise productivity by ensuring that workers are well educated， have the tools needed to produce goods and services， and have access to the best available technology.

Which of the following countries has enjoyed the fastest economic growth in history？ 查看材料

A.Mexico.

B.The United States.

C.Japan.

D.South Korea.

点击查看答案
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