重要提示：请勿将账号共享给其他人使用，违者账号将被封禁！
查看《购买须知》>>>
首页 > 考研
网友您好，请在下方输入框内输入要搜索的题目：
搜题
拍照、语音搜题，请扫码下载APP
扫一扫 下载APP
题目内容 （请给出正确答案）
[主观题]

If there is one thing scientists have to hear, it is that the game is over. Raised on the

belief of an endless voyage of discovery, they recoil from the suggestion that most of the best things have already been located. If they have, today's scientists can hope to contribute no more than a few grace notes to the symphony of science.

A book to be published in Britain this week, The End of Science, argues persuasively that this is the case. Its author, John Horgan, is a senior writer for Scientific American magazine, who has interviewed many of today's leading scientists and science philosophers. The shock of realizing that science might be over came to him, he says, when he was talking to Oxford mathematician and physicist Sir Roger Penrose.

The End of Science provoked a wave of denunciation in the United States last year. "The reaction has been one of complete shock and disbelief, "Mr. Horgan says.

The real question is whether any remaining unsolved problems, of which there are plenty, lend themselves to universal solutions. If they do not, then the focus of scientific discovery is already narrowing. Since the triumphs of the 1960s—the genetic code, plate tectonics, and the microwave background radiation that went a long way towards proving the Big Bang—genuine scientific revolutions have been scarce. More scientists are now alive, spending more money on research, that ever. Yet most of the great discoveries of the 19th and 20th centuries were made before the appearance of state sponsorship, when the scientific enterprise was a fraction of its present size.

Were the scientists who made these discoveries brighter than today's？ That seems unlikely. A far more reasonable explanation is that fundamental science has already entered a period of diminished returns. "Look, don't get me wrong," says Mr Horgan. "There are lots of important things still to study, and applied science and engineering can go on for ever. I hope we get a cure for cancer, and for mental disease, though there are few real signs of progress."

The sentence "most of the best things have already been located" could mean______.

A．most of the best things have already been changed

B．most of the best things remain to be changed

C．there have never been so many best things waiting to be discovered

D．most secrets of the world have already been discovered

答案
查看答案
发布时间：2020-09-17
收藏
更多“If there is one thing scientists have to hear, it is that the game is over. Raised on the”相关的问题

第1题

One should directly come to the Blur Building in the Expo 2002 and skip the rest because__
____.

A．it will be there temporarily

B．it's the most important expo work

C．it's not real and will vanish in the thin air

D．it's near Geneva

点击查看答案

第2题

The making of glass is a very old industry--at least 4,500 years old. Glass has many extra
ordinary qualities and it is frequently being used in new ways.

One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair, which are designed to can-y light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.

Called light wave communication, the new system was used successfully in an experiment in Chicago in 1997. During the experiment, two glass fibers were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.

The lightwave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper. Second, they cost less.

Perhaps it can be said that telephone communication has entered the age of light.

One of the extraordinary qualities of glass is that it can carry ______.

A．sound signals

B．light signals

C．electrical signals

D．any signals

点击查看答案

第3题

Man's first roan invention, and one of the most important inventions in history, was the w
heel. All transportation and every machine in the world depend on it. The wheel is the simplest yet perhaps the most remarkable of an] inventions, because there are no wheels in nature no living thing was ever created with wheels. How, then, did man come to invent the wheel？ Perhaps some early hunters found that they could carry it. However, the logs themselves weighed a lot.

It must have taken a great prehistoric thinker to imagine two thin slices of log connected, at their centers by a string stick, this would roll along just as the logs did, yet be much lighter and easier to handle, thus the wheel and axle came into being and with them the first cart.

The wheel is important because ______ .

A．it was man' s first real invention

B．all transportation depends on it

C．every machine depends on it

D．both B and C

点击查看答案

第4题

Information technologists have dreamt for decades of making an electronic display that is
as good as paper: cheap enough to be pasted on to wails and billboards, clear enough to be read in broad daylight, and thin and flexible enough to be bound as hundreds of flippable leaves to make a book. Over the past few years they have got close. In particular, they have worked out how to produce the display itself, by sandwiching tiny spheres that change colour in response to an electric charge inside thin sheets of flexible, transparent plastic. What they have not yet found is a way to mass-produce flexible electronic circuitry with which to create that charge. But a paper just published in the Proceedings of the National Academy of Sciences suggests that this, too, may be done soon.

The process described by John Rogers and his colleagues from Bell Laboratories, an arm of Lucent Technologies, in New Jersey, and E Ink Corporation, in Cambridge, Massachusetts, starts with E Ink's established half-way house towards true electronic paper. This is based on spheres containing black, liquid dye and particles of white, solid pigment. The pigment particles are negatively charged, so they can be pushed and pulled around by electrodes located above and below the sheet.

The electrodes, in turn, are controlled by transistors under the sheet. Each transistor manipulates a single picture element (pixel), making it black or white. The pattern of pixels, in turn, makes up the picture or text on the page. The problem lies in making the transistors and connections. Established ways of doing this, such as photolithography, use silicon as the semiconductor in the transistors. That is all right for applications suck as pesters. It is too fragile and too expensive, though, for genuine electronic paper—which is why cheap and flexible electronic components are needed.

For flexibility, Dr. Rogers and his colleagues chose pentacene as their semiconductor, and gold as their wiring. Pentacene is a polymer whose semiconducting properties were discovered only recently. Gold is the most malleable metal known, and one of the best electrical conductors. Although it is pricey, so little is needed that the cost per article is tiny.

To make their electronic paper the researchers started with a thin sheet of Mylar, a tough plastic, that was coated with indium-tin oxide (ITO), a transparent electrical conductor. To carve this conductor into a suitable electric circuit, they used an innovation called microcontact printing lithography. This trick involves printing the pattern of the circuit on to the ITO using a rubber stamp. The "ink" in the process is a solvent-resistant chemical that protects this part of the ITO while allowing the rest to be dissolved.

From the first paragraph of the passage, we can learn that an electronic display ______.

A．can be made as good as paper

B．is cheap enough to be pasted on to walls and billboards

C．will be as thin and flexible as paper

D．is difficult to be created in the form. of flexible electronic circuitry

点击查看答案

第5题

Hobbs was an orphan. He worked in-a factory and every day he got a little money. Hard work
changed him thin and weak. He wanted to borrow a lot of money to learn painting pictures, but he did not think he could pay off the debts.

One day the lawyer said to him, "One thousand dollars, and here is the money. "As Hobbs took the package of noted, he was very dumbfounded. He didn't know where the money came from and how to spend it. He said to himself, "I could go to find a hotel and live like a rich man for a few days; or I give up my work in the factory and do what I' d like to do: painting pictures. I could do that for a few weeks, but what would I do after that？ I should have lost myplace of the factory and have no money to live on. If it were a little less money, I would buy a new coat, or a radio, or give a dinner to my friends. If it were more, I could give up the work and pay for painting pictures. But it's too much for one and too little for the other."

"Here is the reading of your uncle's will", said the lawyer, "telling what is to be clone with this money after his death. I must ask you to remember one point. Your uncle has said you must bring me a paper showing exactly what you did with his money, as soon as you have spent it." " Yes, I see. I'll do that. "said the young man.

He wanted to borrow money because he wanted to ______.

A．study abroad

B．work abroad

C．pay for the debts

D．learn to paint pictures

点击查看答案

第6题

A good marriage means growing as a couple but also growing as individuals. This isn't easy
, marriage has always been difficult. Why then are we seeing so many divorces at this time？ Yes, our modern social fabric is thin, and yes the permissiveness of society has created unrealistic expectations and thrown the family into disorder. But divorce is so common be-cause people today are unwilling to exercise the self-discipline that marriage requires. They expect easy joy, like the entertainment on TV, the thrill of a good party.

Marriage takes some kind of sacrifice, net dreadful self-sacrifice of the soul, but some level of compromise. Some of one's fantasies, some of one's legitimate desires have to be given up for the value of the marriage itself. "While all marital partners feel shackled at times, it is they who really choose to make the marital ties into confining chains or supporting bends", says Dr. Whitaker. Marriage requires sexual, financial and emotional discipline. A man and a woman cannot follow every impulse, cannot allow themselves to stop growing or changing.

A divorce is not an evil act. Sometimes it provides salvation(拯救) for people who have grown hopelessly apart or were frozen in patterns of pain or mutual unhappiness. Divorce can be like the first cut of the surgeon's knife, a step toward new health and a good life. On the other hand, if the partners can stay past the breaking up of the romantic myths into the development of real love and intimacy, they have achieved a work as amazing as the greatest cathedrals(教堂) of the world. Marriages that do not fail but improve, that persist despite imperfections, are not only rare these days but offer a wondrous shelter in which the face of our mutual humanity can safely show itself.

According to the author, an ideal marriage life ______.

A．requires considerable sacrifice on both partners

B．requires that the couple be emotionally involved

C．allows for the growth of the husband and wife as a couple and as two individuals

D．is only an illusion in today's society

点击查看答案

第7题

If you are what you eat, then you are also what you buy to eat. And mostly what people buy
is scrawled onto a grocery list, those ethereal scraps of paper that record the shorthand of where we shop and how we feed ourselves. Most grocery lists end up in the garbage. But if you live in St. Louis, they might have a half-life you never imagined, as a cultural document, posted on the Internet.

For the past decade, Bill Keaggy, 33, the features photo editor at The St. Louis Post-Dispatch, has been collecting grocery lists and since 1999 has been posting them online at www.grocerylists.org. The collection, which now numbers more than 500 lists, is strangely addictive. The lists elicit twofold curiosity — about the kind of meal the person was planning and the kind of person who would make such a meal. What was the shopper with vodka, lighters, milk and ice cream on his list planning to do with them？ In what order would they be consumed？ Was it a he or a she？ Who had written "Tootie food, kitten chow, bird food stick, toaster scrambles, coffee drinks"？ Some shoppers organize their lists by aisle; others start with dairy, go to cleaning supplies and then back to dairy before veering off to Home Depot. A few meticulous ones note the price of every item. One shopper had written in large letters on an envelope, simply, "Milk".

The thin lines of ink and pencil jutting and looping across crinkled and torn pieces of paper have a purely graphic beauty. One of life's most banal duties, viewed through the curatorial lens, can somehow seem pregnant with possibility. It can even appear poetic, as in the list that reads "meat, cigs, buns, treats".

One thing Keaggy discovered is that Dan Quayte is not alone — few people can spell bananas and bagels, let alone potato. One list calls for "suchi" and "strimp" . "Some people pass judgment on the things they buy. " Keaggy says. At the end of one list, the shopper wrote "Bud Light" and then "good beer". Another scribbled "good loaf of white bread". Some pass judgment on themselves, like the shopper who wrote "read, stay home or go somewhere, I act like my morn, go to Kentucky, underwear, lemon. "People send messages to one another, too. Buried in one list is this statement: "If you buy more rice, I'll punch you. "And plenty of shoppers, like the one with both ice cream and diet pills on the list, reveal their vices.

What would people usually do with their grocery list after shopping？

A．Buying what it is scrawled on the paper.

B．Recording the shorthand of where we shop.

C．Throwing it into the dustbin.

D．Posting it on the Internet.

点击查看答案

第8题

Text 2A good marriage means growing as a couple but also growing as individuals. This isn'

Text 2

A good marriage means growing as a couple but also growing as individuals. This isn't easy, marriage has always been difficult. Why then are we seeing so many divorces at this time7 Yes, our modern social fabric is thin, and yes the permissiveness of society has created unrealistic expectations and thrown the family into disorder. But divorce is so common be- cause people today are unwilling to exercise the self-discipline that marriage requires. They expect easy joy, like the entertainment on TV, the thrill of a good party.

Marriage takes some kind of sacrifice, net dreadful self-sacrifice of the soul, but some level of compromise. Some of one's fantasies, some of one's legitimate desires have to be given up for the value of the marriage itself. "While all marital partners feel shackled at times, it is they who really choose to make the marital ties into confining chains or supporting bends", says Dr. Whitaker. Marriage requires sexual, financial and emotional discipline. A man and a woman cannot follow every impulse, cannot allow themselves to stop growing or changing.

A divorce is not an evil act. Sometimes it provides salvation (拯救)for people who have grown hopelessly apart or were frozen in patterns of pain or mutual unhappiness. Divorce can be like the first cut of the surgeon' s knife, a step toward new health and a good life. On the other hand, if the partners can stay past the breaking up of the romantic myths into the development of real love and intimacy, they have achieved a work as amazing as the greatest cathedrals(教堂) of the world. Marriages that do not fail but improve, that persist despite imperfections, are not only rare these days but offer a wondrous shelter in which the face of our mutual humanity can safely show itself.

26. According to the author, an ideal marriage life ______.

A) requires considerable sacrifice on both partners

B) requires that the couple be emotionally involved

C) allows for the growth of the husband and wife as a couple and as two individuals

D) is only an illusion in today's society

点击查看答案

第9题

If women are mercilessly exploited year after year, they have only themselves to blame. Be
cause they tremble at the thought of being seen in public in clothes that are out of fashion, they are always taken advantage of by the designers and the big stores. Clothes which have been worn only a few times have to be put aside because of the change of fashion. When you come to think of it, only a woman is capable of standing in front of a wardrobe packed full of clothes and announcing sadly that she has nothing to wear.

Changing fashions are nothing more than the intentional creation of waste. Many women spend vast sums of money each year to replace clothes that have hardly been worn. Women who cannot afford to throw away clothing in this way, waste hours of their time altering the dresses they have. Skirts are lengthened or shortened; neck-lines are lowered or raised, and so on.

No one can claim that the fashion industry contributes anything really important to society. Fashion designers are rarely concerned with vital things like warmth, comfort and durability (耐用). They are only interested in outward appearance and they take advantage of the fact that women will put up with any amount of discomfort, as long as they look right. There can hardly be a man who hasn't at some time in his life smiled at the sight of a woman shaking in a thin dress on a winter day, or delicately picking her way through deep snow in high-heeled shoes.

When comparing men and women in the matter of fashion, the conclusions to be drawn are obvious. Do the constantly changing fashions of women's clothes, one wonders, reflect basic qualities of inconstancy and instability？ Men are too clever to let themselves' be cheated by fashion designers. Do their unchanging styles of dress reflect basic qualities of stability and reliability？ That is for you to decide.

Designers and big stores always make money

A．by mercilessly exploiting women workers in the clothing industry

B．because they are capable of predicting new fashions

C．by constantly changing the fashions in women's clothing

D．because they attach great importance to quality in women's clothing

点击查看答案

第10题

Rocks which have solidified directly from molten materials are called igneous rocks. Igneo
us rocks are commonly referred to as primary rocks because they are the original source of material found in sedimentaries and metamorphics. Igneous rocks compose the greater part of the earth's crust, but they are generally covered at the surface by a relatively thin layer of sedimentary or metamorphic rocks. Igneous rocks are distinguished by the following characteristics: (1) they contain no fossils; (2) they have no regular arrangement of layers; and (3) they are nearly always made up of crystals.

Sedimentary rocks are composed largely of minute fragments derived from the disintegration of existing rocks and in some instances from the remains of animals. As sediments are transported, individual fragments are assorted according to size. Distinct layers of such sediments as gravels, sand, and clay build up, as they are deposited by water and occasionally wind. These sediments vary in size with the material and the power of the eroding agent. Sedimentary materials are laid clown in layers called strata.

When sediments harden into sedimentary rocks, the names applied to them change to indicate the change in physical state. Thus, small stones and gravel cemented together are known as conglomerates; cemented sand becomes sandstone; and hardened clay becomes shale. In addition to these, other sedimentary rocks such as limestone frequently result from the deposition of dissolved material. The ingredient parts are normally precipitated by organic substances, such as shells of clams or hard skeletons of other marine life.

Both igneous and sedimentary rocks may be changed by pressure, heat, solution, or cementing action. When individual grains from existing rocks tend to deform. and interlock, they are called metamorphic rocks. For example, granite, an igneous rock, may be metamorphosed into a gneiss or a schist. Limestone, a sedimentary rock, when subjected to heat and pressure may become marble, a metamorphic rock. Shale under pressure becomes slate.

Which one of the following is a metamorphic rock？

A．Granite.

B．Shale.

C．Slate.

D．Limestone.

点击查看答案

第11题

The professors wife was in the kitchen preparing a salad and ______ cold meat into neat th
in pieces.

A．sawing

B．slitting

C．slicing

D．splitting

点击查看答案
考试指南 全部 >
消防设施操作员可以从事哪些职业？中级消防设施操作员和初级的区别及职责解析消防设施操作员初级证的作用初级消防设施操作员考试内容及要求初级消防员证书的作用及重要性消防设施操作员的起源及发展消防设施操作员等级消防设施操作员证书难考吗？学生家长必读！初级消防员和中级消防员的区别及培训要求消防设施操作员初级实操考什么？学生家长必读！
违法和不良信息举报 在线客服
    搜题
    下载APP
    关注公众号
    TOP
    重置密码
    账号：
    旧密码：
    新密码：
    确认密码：
    确认修改
    购买搜题卡查看答案 购买前请仔细阅读《购买须知》
    请选择支付方式
    • 微信支付
    • 支付宝支付
    点击支付即表示同意并接受了《服务协议》和《购买须知》
    立即支付 系统将自动为您注册账号
    已付款，但不能查看答案，请点这里登录即可>>>
    联系客服
    找回账号密码
    请使用微信扫码支付(元)

    订单号：

    遇到问题请联系在线客服

    请不要关闭本页面，支付完成后请点击【支付完成】按钮
    遇到问题请联系在线客服
    恭喜您，购买搜题卡成功 系统为您生成的账号密码如下：
    重要提示：请勿将账号共享给其他人使用，违者账号将被封禁。
    发送账号到微信 保存账号查看答案
    怕账号密码记不住？建议关注微信公众号绑定微信，开通微信扫码登录功能
    请用微信扫码测试
    尊敬的用户，您尚未绑定微信号
    扫码关注微信公众号，将会重置密码，开通微信扫码登录功能
    您可能还需要：
    重置密码 查看订单 联系客服
    优题宝