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Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a

day in the not-mo-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of travel in the foreseeable future.

The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types.

Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion(拥挤). One proposed solution to this problem is the automated highway system.

When the auto enters the highway system, a retractable(可伸缩的) arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer. The computer will then monitor all of the car's movements.

The driver will use a telephone to dial instructions about his destination into the system. The computer will calculate the best route, and reserve space for the car all the way to the correct exit from the highway. The driver will then be free to relax and wak for the buzzer(蜂鸣器) that will warn of his coming exit. It is estimated that an automated highway will be able to handle 10,000 vehicles per hour, compared with the 1,400 to 2,000 vehicles that can be carried by a present-day highway.

One significant improvement in the future car may probably be ______.

A．its power source

B．its driving system

C．its monitoring system

D．its seating capacity

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更多“Some pessimistic experts feel …”相关的问题

第1题

Having acknowledged receipt of the interview letter，you must prepare for the interview. Fi

rms usually take a good deal of trouble over interviews，and there may be three or more people present，which can be a little frightening. Very often the personnel officer will begin by some words of welcome and an invitation to you to tell them a little about yourself. This is really inviting you to repeat the information you have already supplied on the application form，and which they have already read，but it does have some point. It will put you at your ease，because at least you know all about your own level of achievement and can speak about it confidently. It helps them assess your ability to communicate and your serf-esteem. Some people have too high an opinion of themselves，some take an unduly pessimistic view of their achievements，while others have a nicely balanced assessment of their own abilities.

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第2题

Man cannot go on increasing his number at the present rate. In the【56】30 years man will fa

ce a period of crisis.【57】experts believe that there will be a widespread food【58】. Other experts think this is【59】pessimistic (悲观的), and that man can prevent things from【60】.

【61】thing that man can do is to limit the【62】of babies born. The need【63】this is obvious, but it is not【64】to achieve. People have to be【65】to limit their families. In the countries of the population【66】, many people like big families. The parents think that this【67】a bigger income for the family and ensures there will be someone in the family who will look【68】them in old age.

Several governments have【69】birth control policies in recent years.【70】them are Japan, China, India and Egypt. In some【71】the results have not been successful. Japan has been an【72】. The Japanese adopted a birth control policy in 1948. People were【73】to limit their families. The birth【74】fell from 34.3 per thousand per year to about 17.0 per year【75】present.

(46)

A．second

B．recent

C．next

D．late

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第3题

阅读材料，回答题。Man cannot go on increasing his number at the present rate. In the next 30

阅读材料，回答题。

Man cannot go on increasing his number at the present rate. In the next 30 years man will faca period of crisis. Some experts believe that there will be a widespread food___ 51 ____. Other experthink this is too pessimistic (悲观的), and that man can prevent things from___ 52 ____worse tha they are now. But remember that two thirds of the people in the world are under-nourished or stmving now.

One thing that man can do is to limit the___ 53 ____of babies born. The need for this is obvious but it is not easy to achieve. People have to be___ 54 ____to limit their families. In the countries of the population___ 55 ____, many people like big families. The parents think that this makes a bigger income for the family and ensures there will be someone in the family who will look___ 56 ____them in old age.

Several governments have___ 57 ____birth control policies in recent years. Among them are Japan, China, India and Egypt. In some cases the results have not been successful. Japan has been an___ 58____The Japanese adopted a birth control policy in 1921~3. People were___ 59 ____to limit their families. The birth rate fell from 34.3 per thousand per year to about 17.0 per year___ 60 ____ present.

________ 查看材料

A.Need

B.want

C.Absence

D.shortage

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第4题

adj. 可耻的（）

A.nnoyed

B.shameful

C.iscouraged

D.pessimistic

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第5题

Toward the new business wave, the writer\'s attitude can be said to be _______ .A o

Toward the new business wave, the writer\'s attitude can be said to be _______ .

A optimistic

B objective

C pessimistic

D biased

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第6题

For the past several decades, it seems there's bee...

For the past several decades, it seems there's been a general consensus on how to get ahead in America: Get a college education, find a reliable job, and buy your own home. But do Americans still believe in that path, and if they do, is it attainable？ The most recent National Journal poll asked respondents about the American dream, what it takes to achieve their goals, and whether or not they felt a significant amount of control over their ability to be successful. Overwhelmingly, the results show that today， the idea of the American dream—and what it takes to achieve it—looks quite different than it did in the late 20th century. By and large, people felt that their actions and hard work—not outside forces—were the deciding factor in how their lives turned out. But respondents had decidedly mixed feelings about what actions make for a better life in the current economy. In the last seven years, Americans have grown more pessimistic about the power of education to lead to success. Even though they see going to college as a fairly achievable goal, a majority—52 percent—think that young people do not need a four-year college education in order to be successful. Miguel Maeda, 42, who has a master's degree and works in public health, was the first in his family to go to college, which has allowed him to achieve a sense of financial stability his parents and grandparents never did. While some, like Maeda, emphasized the value of the degree rather than the education itself, others still see college as a way to gain new perspectives and life experiences. Sixty-year-old Will Fendley, who had a successful career in the military and never earned a college degree, thinks "personal drive" is far more important than just going to college. To Fendley， a sense of drive and purpose, as well as an effective high-school education, and basic life skills, like balancing a checkbook, are the necessary ingredients for a successful life in America. 51.It used to be commonly acknowledged that to succeed in America, one had to have _____.

A.an advanced academic degree

B.an ambition to get ahead

C.a firm belief in their dream

D.a sense of drive and purpose

52.What is the finding of the latest National Journal poll concerning the American dream_____

A.More and more Americans are finding it hard to realize.

B.It remains alive among the majority of American people.

C.Americans' idea of it has changed over the past few decades.

D.An increasing number of young Americans are abandoning it.

53.What do Americans now think of the role of college education in achieving success_____

A.It still remains open to debate.

B.It has proved to be beyond doubt.

C.It is no longer as important as it used to be.

D.It is much better understood now than ever.

54.How do some people view college education these days_____

A.It promotes gender equality.

B.It needs to be strengthened.

C.It adds to cultural diversity.

D.It helps broaden their minds.

55.What is one factor essential to success in America, according to Will Fendley_____

A.A desire to learn and to adapt.

B.A strong sense of responsibility.

C.A willingness to commit oneself.

D.A clear aim and high motivation.

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第7题

For the past several decades, it seems there's been a general consensus on how to

get ahead in America: Get a college education, find a reliable job, and buy your own home. But do Americans still believe in that path, and if they do, is it attainable？

The most recent National Journal poll asked respondents about the American dream, what it takes to achieve their goals, and whether or not they felt a significant amount of control over their ability to be successful. Overwhelmingly, the results show that today， the idea of the American dream—and what it takes to achieve it—looks quite different than it did in the late 20th century.

By and large, people felt that their actions and hard work—not outside forces—were the deciding factor in how their lives turned out. But respondents had decidedly mixed feelings about what actions make for a better life in the current economy.

In the last seven years, Americans have grown more pessimistic about the power of education to lead to success. Even though they see going to college as a fairly achievable goal, a majority—52 percent—think that young people do not need a four-year college education in order to be successful.

Miguel Maeda, 42, who has a master's degree and works in public health, was the first in his family to go to college, which has allowed him to achieve a sense of financial stability his parents and grandparents never did.

While some, like Maeda, emphasized the value of the degree rather than the education itself, others still see college as a way to gain new perspectives and life experiences. Sixty-year-old Will Fendley, who had a successful career in the military and never earned a college degree, thinks "personal drive" is far more important than just going to college. To Fendley， a sense of drive and purpose, as well as an effective high-school education, and basic life skills, like balancing a checkbook, are the necessary ingredients for a successful life in America.

71.It used to be commonly acknowledged that to succeed in America, one had to have _____.

A.an advanced academic degree

B.an ambition to get ahead

C.a firm belief in their dream

D.a sense of drive and purpose

72.What is the finding of the latest National Journal poll concerning the American dream____

A.More and more Americans are finding it hard to realize.

B.It remains alive among the majority of American people.

C.Americans' idea of it has changed over the past few decades.

D.An increasing number of young Americans are abandoning it.

73.What do Americans now think of the role of college education in achieving success____

A.It still remains open to debate.

B.It has proved to be beyond doubt.

C.It is no longer as important as it used to be.

D.It is much better understood now than ever.

74.How do some people view college education these days____

A.It promotes gender equality.

B.It needs to be strengthened.

C.It adds to cultural diversity.

D.It helps broaden their minds.

75.What is one factor essential to success in America, according to Will Fendley____

A.A desire to learn and to adapt.

B.A strong sense of responsibility.

C.A willingness to commit oneself.

D.A clear aim and high motivation.

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第8题

Exp表示（）

A.生产日期

B.保质期

C.有效量

D.剂量

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第9题

关于exp，下列说法正确的是（)。

A.exp可以使用QUERY语句只导出部分数据

B.可以采用并行方式进行导出

C.exp是属于客户端工具

D.exp是属于服务器端工具

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第10题

玻耳兹曼分布为（)。

A.w/(exp(a+be)-1)

B.wexp(-a-be)

C.w/(exp(a+be)+1)

D.w(exp(a+be)+1)

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第11题

试求方程组x'=Ax的一个基解矩阵，并计算exp（At)，其中A为：

试求方程组x'=Ax的一个基解矩阵，并计算exp(At)，其中A为：

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