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It has always been difficult for the philosopher or scientists to fit time into his view o

f the universe. Prior to Einsteinian physics, there was no truly adequate formulation of the relationship of time to the other forces in the universe, even though some empirical equations included time qualities. However, even the Einsteinian formulation is not perhaps totally adequate to the job of fitting time into the proper relationship with the other dimensions, as they are called, of space. The primary problem arises in relation to things that might be going faster than the speed of light, or have other strange properties,

Examination of the Lorentz-Fitsgerald formulas yields the interesting speculation that if something did actually exceed the speed of light it would have its mass expressed as an imaginary number and would seem to be going backwards in time. The barrier to exceeding the speed of light is the apparent need to have an infinite quantity of mass moved at exactly the speed of light. If this situation could be leaped over in a large quantum jump--which seems highly unlikely for masses that are large in normal circumstances--then the other side may he achievable.

The idea of going backward in time is derived from the existence of a time vector that is negative, although just what this might mean to our senses in the unlikely circumstance of our experiencing this state cannot be conjectured.

There have been, in fact, some observations of particle chambers which have led some scientists to speculate that a particle called the tachyon may exist with the trans-light properties we have just discussed.

The difficulties of imagining and coping with these potential implications of our mathematical models points out the importance of studying alternative methods of notation for advanced physics. Professor Zuckerandl, in his book Sound and Symbol, hypothesized that it might be better to express the relationships bund in quantum mechanics through the use of a notation derived from musical notations. To oversimplify greatly, he argues that music has always given time a special relationship to other factors or parameters or dimensions. Therefore, it might be a more useful language in which to express the relationships in physics where time again has a special role to play, and cannot be treated as just another dimension.

The point of this, or any other alternative to the current methods of describing basic physical processes, is that time does not appear--either by common experience or sophisticated scientific understanding--to be the same sort of dimension or parameter as physical dimensions, as is deserving of completely special treatment, in a system of notation designed to accomplish that goal.

One approach would be to consider time to be a field effect governed by the application of energy to mass that is to say, by the interaction of different forms of energy, if you wish to keep in mind the equivalence of mass and energy. The movement of any normal sort of mass is bound to produce a field effect that we call positive time. An imaginary mass would produce a negative time field effect. This is not at variance with Einstein's theories, since the "faster" a given mass moves the more energy was applies to it and the greater would be the field effect The time effects predicted by Einstein and confirm by experience are, it seems, consonant with this concept. (565)

The passage supports the inference that ______.

A．Einstein's theory of relativity is wrong

B．the Lorentz-Fitzgerald formulas contradict Einstein's theories

C．time travel is dearly possible

D．it is impossible to travel at precisely the speed of light

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更多“It has always been difficult f…”相关的问题
第1题
The English language has always changed, but the rate of change has been uneven.A．portionB

The English language has always changed, but the rate of change has been uneven.

A．portion

B．speed

C．standard

D．measure

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第2题
Henry David Thoreau's work, ______ has always been regarded as at masterpiece of New Engla
nd Transcendentalism.

A．Daisy Miller

B．White Fang

C．Walden

D．The Prince and the Pauper.

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第3题
Modern technology and science have produced a wealth of new materials and new ways of usin
g old materials. For the artist this means wider opportunities. There is no doubt that the limitations of materials and nature of tools both restrict and shape a man's work. Observe how the development of plastics and light metals along with new methods of welding has changed the direction of sculpture. Transparent plastic materials allow one to look through an object, to see its various sides superimposed on each other (as in Cubism or in an X-ray). Today, welding is as prevalent as casting was in the past. This new method encourages open designs, where surrounding and intervening space becomes as important as form. itself.

More ambiguous than other scientific inventions familiar to modern artists, but no less influential, are the psychoanalytic studies of Freud and his followers, discoveries that have infiltrated recent art, especially Surrealism. The Surrealists, in their struggle to escape the monotony and frustrations of everyday life, claimed that dreams were the only hope. Turning to the irrational world of their unconscious, they banished all time barriers and moral judgements to combine disconnected dream experiences from the past, present and intervening psychological states. The Surrealists were concerned with overlapping emotions more than with overlapping forms. Their paintings often become segmented capsules of associative experiences. For them, obsessive and often unrelated images replaced the direct emotional message of expressionism. They did not need to smash paint and canvas; they went beyond this to smash the whole continuity of logical thought.

There is little doubt that contemporary art has taken much from contemporary life. In a period when science has made revolutionary strides, artists in their studios have not been unaware of scientists in their laboratories. But this has rarely been a one-way street. Painters and sculptors, though admittedly influenced by modern science, have also molded and changed our world. If break-up has been a vital part of their expression, it has not always been a symbol of destruction. Quite the contrary: it has been used to examine more fully, to penetrate more deeply, to analyze more thoroughly, to enlarge, isolate and make more familiar certain aspects of life that earlier we were apt to neglect. In addition, it sometimes provides rich multiple experiences so organized as not merely to reflect our world, but in fact to interpret it.

According to the 'passage, it is true that ______.

A．artistic creations seem to be the reproductions of modern technology

B．artistic creations have made great strides scientifically

C．artistic creations appear to be incapable of ignoring material advances

D．artistic creations are the reflection of the material world

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第4题
1 One of the good things for men in women's liberation is that men no longer have to pay
women the old-fashioned courtesies.

2 In an article on the new manners, Ms. Holmes says that a perfectly able woman no longer has to act helplessly in public as if she were a model. For example, she doesn't need help getting in and out of cars. "Women get in and out of cars twenty times a day with babies and dogs. Surely they can get out by themselves at night just as easily."

3 She also says there is no reason why a man should walk on the outside of a woman on the sidewalk. "Historically, the man walked on the inside so he caught the garbage thrown out of a window. Today a man is supposed to walk on the outside. A man should walk where he wants to. So should a woman. If, out of love and respect, he actually wants to take the blows, he should walk on the inside — because that's where attackers are all hiding these days."

4 As far as manners are concerned, I suppose I have always been a supporter of women's liberation. Over the years, out of a sense of respect, I imagine, I have refused to trouble women with outdated courtesies.

5 It is usually easier to follow rules of social behaviour than to depend on one's own taste. But rules may be safely broken, of course, by those of us with the gift of natural grace. For example, a woman is expected to sit in the chair. That is according to Ms. Ann Clark. I have always done it the other way, according to my wife.

6 It came up only the other night. I followed the hostess to the table, and when she pulled the chair out I sat on it, quite naturally, since it happened to be the chair I wanted to sit in.

7 "Well," my wife said, when the hostess had gone, "you did it again."

8 "Did what？" I asked, utterly confused.

9 "Took the chair."

10 Actually, since I'd walked through the restaurant ahead of my wife, it would have been awkward, I should think, not to have taken the chair. I had got there first, after all.

11 Also, it has always been my custom to get in a car first, and let the woman get in by herself. This is a courtesy I insist on as the stronger sex, out of love and respect. In times like these, there might be attackers hidden about. It would be unsuitable to put a woman in a car and then shut the door on her, leaving her at the mercy of some bad fellow who might be hiding in the back seat.

It can be concluded from the passage that______.

A．men should walk on the inside of a sidewalk.

B．women are becoming more capable than before.

C．in women's liberation men are also liberated.

D．it's safe to break rules of social behaviour.

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第5题
第二节 完型填空阅读下面短文，从短文后所给各题的四个选项（A、B、C和D)中选出能填入相应空白处的最

第二节 完型填空

阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。

During the 9th century scientists found that when certain parts of the brain of a man were 【B1】 ,he would lose the 【B2】 to do certain things. And so, people thought that each part of the brain does a different 【B3】 . But modern research has 【B4】 out that this is not so, for it is not 【B5】 to say 【B6】 what each part of the brain does.

In the past fifty years there 【B7】 a great increase in the amount of research 【B8】 on the brain. Chemists and biologists have 【B9】 that the 【B10】 the brain works it is not so 【B11】 as people in general may think. Chemists tell us that 100,000 chemical changes 【B12】 in the brain every second. Some recent researches also 【B13】 that we can remember every thing 【B14】 happens 【B15】 us. We 【B16】 not be able to recall(回忆)the things we've heard and seen, but it is all kept there in the storehouse of the human mind.

Earlier scientists thought the power of one's brain got weaker as one grow 【B17】 . But it is now thought that is not 【B18】 . As long as the brain is 【B19】 【B20】 exercise it keeps its ability. It has been proved that an old person who has always been active in the mind has a quicker mind than a young person who has only done physical work without using much of his brain. It is now thought that the more work we give our brains, the more work they are able to do.

【B1】

A．destroyed

B．injured

C．broken

D．wounded

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第6题
Everyone seems to be in favor of progress. But " progress" is a funny word. It doesn't nec
essarily mean that something has become stronger, wiser, or better. It simply means changing it from being one thing to another and sometimes it turns out to be worse than before.

Consider medicine, for instance. No one can deny that medical progress has enriched our lives tremendously. Because of medical advances, we eat better, live easier and are able to take care of ourselves more efficiently. We can cure disease with no more than one injection or a pill. If we have a serious accident, surgeons can put us back together again. If we are born with something defective, they can repair it. They can make us happy, restore our normality, ease our pain, replace worn parts and give us children. They can even bring us back from the dead. These are wonderful achievements, but there is a price we have to pay.

Because medicine has reduced infant mortality and natural death so significantly, the population has been rising steadily, in spite of serious efforts to reduce the rate of population growth. Less than a century ago in the United Stales, infant mortality claimed more than half of the newborn within the first year of life. Medical advances, however, have now reduced that rate to nearly zero. A child born in the United States today has better than a 90% chance of survival. Furthermore, medical advances have ensured that most of these infants will live to be seventy years of age or more, and even that life expectancy increases every year. The result of this progress is an enormous population increase that threatens the quality of life, brought about by progress in the medical profession.

According to this passage, " progress" doesn't always mean that______.

A．something has become stronger and better

B．something has been changed from being one thing to another

C．something has become funny

D．something turns out to be worse than before

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第7题
Most of us are taught to pay attention to what is said—the words. Words do provide us with
some information, but meanings are (1)_____ from so many other sources that it would hinder our effectiveness (2)_____ a partner to a relationship to rely too heavily on words (3)_____ Words are used to describe only a small part of the many ideas we associate with any given (4)_____. Sometimes we can gain insight into some of those (5)_____ if we listen for (6)_____ words. We don't always say what we mean (7)_____ mean what we say. Mostly we mean several things at once. A person wanting to purchase a house says to the current owner. "This step has to be fixed before I'll buy". The owner says, "It's been like that for years". (8)_____, the step hasn't been like that for years, but the (9)_____ message is: "I don't want to fix it. We can put up with it why can't you？" The (10)_____ for a more expansive view of meaning can be developed by examining a message (11)_____ who said it, when it occurred, the (12)_____ conditions or situation, and how it was said.

When a message occurs can also (13)_____ associated meaning. A friend's unusually docile behavior. may only be understood by (14)_____ that it was preceded by situations that required a(n) (15)_____ amount of assertiveness.

We would do well to listen for how message are (16)_____ The words, "it sure has been nice to have you over", can be said with (17)_____ and excited or ritualistically. The phrase can be said once or (18)_____ several times. And the meaning we associate with the phrase will change (19)_____ Sometimes if we say something infrequently it assumes more importance; sometimes the more we say something the (20)_____ importance it assumes.

A．omitted

B．resulted

C．dismissed

D．derived

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第8题
The natural environment has, of course, always conditioned technology. For example, the na
ture of an environment (polar, desert, jungle) engenders the development of technologies appropriate to that environment to enable man to adapt successfully to it. Farther, emerging scarcity of some technological resource may ignite a research for, and gradual transition to, a new technology using resources present in the environment in greater abundance, as, for example, in the case of the gradual change from wood-based to coal-based technology in England that began in Elizabeth times and stretched until the end of the eighteenth century.

In modem Western society, environment has begun to condition technology in new ways, although admittedly more indirectly, The safety and quality of the environment and public perceptions of it have begun to translate into presidential politics and congressional mandates to regulatory agencies to protect or enhance environmental quality or safety, occasionally even at the cost of some perturbation of the tech-economic status-quo. In France, Italy, and recently the United States, political parties have been formed, organized around a complex of technology / environment issues. In general, in the last fifteen years, the gradual development of broad-based environmental awareness, the lobbying and litigious activities of environmental interest groups, and guidelines issued and reinforced by the EPA (Environmental Protection Agency) in response to congressional mandates have markedly increased the heed paid to the environment by many corporations in going about their technological activities. Both research and development priorities and capital investment programs of the corporations have been affected by this.

Which of the following statements is TRUE？

A．Environment enables man to adapt successfully to new technology.

B．Technologies enable man to adapt successfully to his environment.

C．The development of technologies depends solely on the natural environment.

D．Lack of technologies to cope with the environment is caused by lack of natural resources.

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第9题
Scattered around the globe are more than 100 small regions of isolated volcanic activity k
nown to geologists as hot spots, unlike most of the world's volcanoes, they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of them lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The hot spots and their volcanic trails are milestones that mark the passage of the plates.

That the plates are moving is now beyond dispute. Africa and South America, for example, are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots, anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot spot population it appears that the African plate is stationary and that it has not moved during the past 30 mil lion years.

The significance of hot spots is not confined to their role as a frame. of reference. It now appears that they also have an important influence on the geophysical processes that propel the plates across the globe. When a continental plate comes to rest over a hot spot, the material rising from deeper layer creates a broad dome. As the dome grows, it develops deed fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hot spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy).

The author believes that ______.

A．the motion of the plates corresponds to that of the earth's interior

B．the geological theory about drifting plates has been proved to be truse

C．the hot spots and the plates move slowly in opposite directions

D．the movement of hot spots proves the continents are moving apart

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第10题
Woodrow Wilson was referring to the liberal idea of the economic market when he said that
the free enterprise system is the most efficient economic system. Maximum freedom means maximum productiveness; our "openness" is to be the measure of our stability. Fascination with this ideal has made Americans defy the "Old World" categories of settled possessiveness versus unsettling deprivation, a "status quo" defended or attacked.

The United States, it was believed, had no status quo ante. Our only "station" was the turning of a stationary wheel, spinning faster and faster. We did not base our system on property but opportunity—which meant we based it not on stability but on mobility. The more things changed, that is, the more rapidly the wheel turned, the steadier we would be. The conventional picture of class politics is composed of the Haves, who want a stability to keep what they have, and the Have-Nots, who want a touch of instability and change in which to scramble for the things they have not. But Americans imagined a condition in which speculators, self-makers, runners are always using the new opportunities given by our land. These economic leaders (front-runners) would thus be mainly agents of change. The nonstarters were considered the ones who wanted stability, a strong referee to give them some position in the race, a regulative hand to calm manic speculation; an authority that can call things to a halt, begin things again from compensatorily staggered "starting lines."

"Reform" in America has been sterile because it can imagine no change except through the extension of this metaphor of a race, wider inclusion of competitors, "a piece of the action," as it were, for the disenfranchised. There is no attempt to call off the race. Since our only stability is change, America seems not to honor the quiet work that achieves social interdependence and stability. There is, in our legends, no heroism of the office clerk, no stable industrial work force of the people who actually make the system work. There is no pride in being an employee (Wilson asked for a return to the time when everyone was an employer). There has been no boasting about our social workers--they are merely signs of the system's failure, of opportunity denied or not taken, of things to be eliminated. We have no pride in our growing interdependence, in the fact that our system can serve others, that we are able to help those in need; empty boasts from the past make us ashamed of our present achievements, make us try to forget or deny them, move away from them. There is no honor but in the Wonderland race we must all run, all trying to win, none winning in the end (for there is no end).

Which of the following best expresses the author's main point？

A．The absence of a status quo ante has undermined United States economic structure.

B．The free enterprise system has been only a useless concept in the United States.

C．The myth of the American free enterprise system is seriously flawed.

D．Fascination with the ideal of "openness" has made Americans a progressive people.

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第11题
Over the last 25 years, British society has changed a great deal — or at least many parts
of it have. In some ways, however, very little has changed, particularly where attitudes are concerned. Ideas about social class — whether a person is "working-class" or "middle-class"— are one area in which changes have been extremely slow.

In the past, the working-class tended to be paid less than middle-class people, such as teachers and doctors. As a result of this and also of the fact that workers' jobs were generally much less secure, distinct differences in life-styles and attitudes came into existence. The typical working man would collect his wages on Friday evening and then, it was widely believed, having given his wife her "housekeeping", would go out and squander the rest on beer and betting.

The stereotype of what a middle-class man did with his money was perhaps nearer the troth. He was — and still is — inclined to take a longer-term view. Not only did he regard buying a house as a top priority, but he also considered the education of his children as extremely important. Both of these provided him and his family with security. Only in very few cases did workers have the opportunity (or the education and training) to make such long-term plans.

Nowadays, a great deal has changed. In a large number of cases factory workers earn as much, if not more, than their middle-class supervisors. Social security and laws to improve job-security, combined with a general rise in the standard of living since the mid-fifties of the 20th century, have made it less necessary than before to worry about "tomorrow". Working-class people seem slowly to be losing the feeling of inferiority they had in the past. In fact there has been a growing tendency in the past few years for the middle-classes to feel slightly ashamed of their position.

The changes in both life-styles and attitudes are probably most easily seen amongst younger people. They generally tend to share very similar tastes in music and clothes, they spend their money in having a good time, and save for holidays or longer-term plans when necessary. There seems to be much less difference than in previous generations. Nevertheless, we still have a wide gap between the well-paid (whatever the type of job they may have) and the low-paid. As long as this gap exists, there will always be a possibility that new conflicts and jealousies will emerge, or rather that the old conflicts will re-appear, but between different groups.

Which of the following is seen as the cause of class differences in the past？

A．Life style. and occupation.

B．Attitude and income.

C．Income and job security.

D．Job security and hobbies.

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