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Why do the American doctors think of using laser light to treat heart disease？
A．Beeause laser light is quite powerful．
B．Because laser light is penetrating．
C．Because laser light can destroy the blocking materials in human’s artery．
D．Because laser light can travel through the human body．
答案
更多“Why do the American doctors think of using laser light to treat heart disease？A．B”相关的问题
第1题
Why do the two "explanations" (Para. 3, Line l)worry Asian Americans？
A．They are afraid that they would again be isolated from American society in general.
B．People would think that Asian students rely on their parents for success.
C．Asian American would be a threat to other minorities.
D．American academic achievements have taken on too strong an Asian character.
第2题
Why does the writer say that the American society today is an "impersonal" society (last paragraph)？
A．Because American people do not like to talk to each other.
B．Because the society does not have small communities now.
C．Because not many people say "hello" to each other when they meet.
D．Because people no longer maintain close relations with each other.
第3题
One important cause of the generation gap is the opportunity that young people have to choose their own ways of life.In a more traditional society, when children grow up, they are expected to live in the same area as their parents, to marry people that their parents know and like, and often to continue the family jobs.In our society, young people often travel great distances for their education, move out of the family at an early age, marry or live with people whom their parents have never met, and choose jobs different from those of their parents.
In our society, parents often expect their children to do better than they did, to find better jobs, to make more money and to do all the things that they were unable to do.Often, that is another cause of the gap between them.Often, they discover that they have very little in common with each other.
Finally, the speed at which changes take place in our society is the third cause of the gap between the generations.In a traditional culture, senior people are valued for their knowledge, but in our society the knowledge of a lifetime may become out of date.The young and the old seem to live in two very different worlds, separated by different skills and abilities.No doubt, the generation gap will continue in American life for some time to come.
1.The first paragraph tells us that ______.
A、the problem of the generation gap draws much attention from people
B、it is out of date to talk about the generation gap
C、children and parents are trying to understand each other
D、it is very important for people to frequently communicate with each other
2.In a more traditional society, old people_______.
A、have their children respect and listen to them
B、do not care for their children at all
C、expect their children to rebel against them
D、do not live together with their children
3.In American society young people________.
A、do not need to find jobs
B、leave home at an early age
C、have better education than their parents
D、marry people younger than them
4.Which of the following is NOT the cause of the generation gap______.
A、Young people like to depend more on themselves.
B、Parents do not love their children dearly.
C、American society changes rapidly.
D、Parents expect too much of their children.
5.The main idea of the passage is ________.
A、that the generation gap needs considering
B、when the generation gap is necessary in American society
C、why the generation gap exist
D、how we can reduce the generation gap
第4题
Sitting in a dark theater, watching the images on the screen, they enter another world that is real to them. They become involved in the lives of the characters in the movie, and for two hours, they forget all about their own problems. They are in a dream world where things often appear to be more romantic (浪漫的) and beautiful than in real life.
The biggest "dream factories" are in Hollywood, the capital of the film industry. Each year, Hollywood studios make hundreds of movies that are shown all over the world. American movies are popular because they tell stories and they are well-made. They provide the public with heroes who do things the average person would like to do but often can't. People have to cope with many problems and much trouble in real life, so they feel encouraged when they see the" good guys "win in the movies.
The Americans go to the movies mainly because they want______.
A．to enjoy a good story
B．to experience an exciting life
C．to see the actors and actresses
D．to escape their daily life
第5题
Why was the American surprised at the Chinese student's answer？
A．Because he wondered whether the student could really speak good English.
B．Because he could hardly hear what the student had said.
C．Because he wouldn't like others to say "No".
D．Because the way to accept a compliment in China is not the same as that in the western countries.
第6题
Few people experience this type of lifelong relationship or sense of community togetherness now. The American society is much more unsettled now; people often move from neighborhood to neighborhood, city to city, and coast to coast. It is rare to find people who have lived all their lives in one community. Because people move so frequently, they do not have a chance to get to know their neighbors. Perhaps this is also why Americans tend to have a more casual attitude about friendships than people from some other cultures; Americans are accustomed to leaving friends and making new friends. In such an impersonal society, people have lost the habit of saying hello to people they pass on the streets or in the hallways of their apartment buildings.
What is described in the first paragraph？
A．Entertainment in small towns.
B．Americans' adjustment to a moving society.
C．The life style. of Americans in the past.
D．Personal relations in small communities.
第7题
Why might Irving' s literary ability have been surprising to the English？
A．They feared competition from American writers.
B．They did not expect the United States to produce good writers.
C．They disapproved of the language American writers used.
D．They thought of the United States as a purely commercial power.
第8题
A.it is the largest city
B.it is the largest in population
C.it is the most beautiful city
D.it is the capital of the United States
第9题
Samuel Preston, a sociologist at the University of Pennsylvania, studied how the American family is changing. He reported that by the time the average American couple reaches about 40 years of age, their parents are usually still alive. The statistics show the change in lifestyles and responsibilities of aging (老龄化) Americans. The average middle-aged couple can look forward to caring for elderly parents sometime after their own children have grown up. Moreover, because people today live longer after an illness than people did years ago, family members must provide long-term care. These facts also mean that after caregivers provide for their elderly parents, who will eventually die, they will be old and may require care too. When they do, their spouses (配偶) will probably take care of them because they have had fewer children than their parents did.
Because Americans are living longer than ever, more social workers have begun to study ways of caregiving to improve the care of the elderly. They have found that all caregivers share a common characteristic; They believe that they are the best people for the job. The social workers have also discovered three basic reasons why the caregivers take on the responsibility of caring for an elderly, dependent relative. Many caregivers believe they had an obligation (职责) to help their relatives. Some think that helping others makes them feel more useful. Others hope that by helping someone now, they will deserve care when they become old and dependent.
Samuel Preston's study shows that______.
A．lifestyles and responsibilities of the elderly are not changing
B．most American couples over 40 have no living parents
C．middle-aged Americans have to take care of their children and parents at the same time
D．elderly people may need care for a long time because they live longer after an illness
第10题
Researchers from the London School of Hygiene & Tropical Medicine said consumers were paying higher prices for organic food because of its imagined health benefits, creating a global organic market worth an estimated $48 billion in 2007.
A systematic review of 162 scientific papers published in the scientific literature over the last 50 years, however, found there was no significant difference.
"A small number of differences in nutrient content were found to exist between organically and conventionally (通常) produced foodstuffs, but these have nothing to do with public health, " said Alan Dangour, one of the report's authors.
"Our review indicates that there is currently no evidence to support the selection of organically over conventionally produced foods on the basis of nutritional superiority . "
The results of research, which was commissioned by the British government's Food Standards Agency, were published in the American Journal of Clinical Nutrition.
Sales of organic food have fallen in some markets, including Britain, as a slowdown in economic growth has led consumers to cut back on purchases.
The Soil Association said that growth in sales of organic products in Britain slowed to just 1.7percent, well below the average annual growth rate of 26 percent over the last decade.
Why does organic food cost more than conventionally produced food？
A．Because people think they are much healthier.
B．Because they are more delicious.
C．Because people prefer organic food.
D．Because they sell better.
