Since the dawn of human ingenuity, people have devised ever more cunning tools to cope with work that is dangerous, boring, burdensome, or just plain nasty. That compulsion has resulted in robotics--the science of conferring various human capabilities on machines. And if scientists have yet to create the mechanical version of science fiction, they have begun to come close.As a result, the modern world is increasingly populated by intelligent gizmos whose presence we barely notice but whose universal existence has removed much human labor. Our factories hum to the rhythm of robot assembly arms. Our banking is done at automated teller terminals that thank us with mechanical politeness for the transaction. Our subway trains are controlled by tireless robo-drivers. And thanks to the continual miniaturization of electronics and micro-mechanics, there are already robot systems that can perform some kinds of brain and bone surgery with submillimeter accuracy--far greater precision that highly skilled physicians can achieve with their hands alone.But if robots are to reach the next stage of laborsaving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves--goals that pose a real challenge. "While we know how to tell a robot to handle a specific error," says Dave Lavery, manager of a robotics program at NASA, "we can’t yet give a robot enough ’common sense’ to reliably interact with a dynamic world. "Indeed the quest for true artificial intelligence has produced very mixed results. Despite a spell of initial optimism in the 1960s and 1970s when it appeared that transistor circuits and microprocessors might be able to copy the action of the human brain by the year 2010, researchers lately have begun to extend that forecast by decades if not centuries.What they found, in attempting to model thought, is that the human brain’s roughly one hundred billion nerve cells are much more talented--and human perception far more complicated-than previously imagined. They have built robots that can recognize the error of a machine panel by a fraction of a millimeter in a controlled factory environment. But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of winding forest road or the single suspicious face in a big crowd. The most advanced computer system on Earth can’t approach that kind of ability, and neuroscientists still don’t know quite how we do it. According to the text, what is beyond man’s ability now is to design a robot that can ().
A. fulfill delicate tasks like performing brain surgery
B. interact with human beings verbally
C. have a little common sense
D. respond independently to a changing world
阅读下面的短文,文中有15处空白,每处空白给出了4个选项,请根据短文的内容从 4个选项中选杆1个最佳答案。 Something Men Do Not Like to Do Eric Brown hates shopping. "It’s just not enjoyable to me," said the 28-year-old Chicago man who was carrying several shopping bags along the city’s main street, Michigan Avenue. "When I’m out (51) , I basically know what I want to get. I rush in. I buy it. I (52) ." Common wisdom says that guys hate to shop. You can ask generations of men. But people who study shopping say that a number of social, cultural and economic factors are now (53) this "men-hate-to-shop" notion. (54) social class and age, men say they hate to shop," says Sharon Zukin, a City University of New York sociology professor. "Yet when you ask them deeper questions, it turns out that they (55) to shop. Men generally like to shop for (56) , music and hardware (硬件). But if you ask them about the shopping they do for books or music, they’ll say, ’Well, that’s not shopping. That’s (57) " In other words, what men and women call "buying things" and how they approach that task are (58) . Women will (59) through several 1,000-square-metre stores in search of the perfect party dress. Men will wander through 100 Internet sites in search of the (60) digital camcorder (摄像放像机). Women see shopping as a social event. Men see it as a mission or A. (61) to be won. "Men are frequently shopping to win," says Mary Ann McGrath, a marketing professor at Loyola University of Chicago. "They want to get the best deal. They want to get the best one, the last one and if they do that it (62) them happy." When women shop, "they’re doing it in a way where they want (63) to be very happy," says McGrath. "They’re kind of shopping for love." In fact, it is in clothing where we see a male-female (64) most clearly. Why, complain some men, are all male clothes navy, black or brown But would they wear light green and pink (粉红色的) These days, many guys wear a sort of "uniform", says Pace Underhill, author of "Why We Buy". "It’s been hard for them to understand what it means to be fashion-conscious (时尚) in a business way. It becomes much, much easier (65) you narrow your range of choices."
A. because
B. although
C. since
D. if
Could the bad old days of economic decline be about to return Since OPEC agreed to supply-cuts in March, the price of crude oil has jumped to almost $ 26 a barrel, up from less than $10 last December. This near-tripling of oil price calls up scary memories of the 1973 oil shocks resulted in double-digit inflation and global economic decline. So where are the headlines warning of gloom and doom this timeThe oil price was given another push up this week when Iraq suspended oil exports. Strengthening economic growth, at the same time as winter grips the northern hemisphere, could push the price higher still in the short term.Yet there are good reasons to expect the economic consequences now to be less severe than in the 1970s. In most countries the cost of crude oil now accounts for a smaller share of the price of petrol than it did in the 1970s. In Europe, taxes account for up to four-fifths of the retail price, so even quite big changes in the price of crude have a more muted effect on pump prices than in the past.Rich economies are also less dependent on oil than they were, and so less sensitive to swings in the oil price. Energy conservation, a shift to other fuels and a decline in the importance of heavy, energy-intensive industries have reduced oil consumption. Software, consultancy and mobile telephones use far less oil than steel or car production. For each dollar of GDP (in constant prices) rich economies now use nearly 50% less oil than in 1973. The OECD estimated in its latest Economic Outlook that, if oil prices averaged $ 22 a barrel for a full year, compared with $13 in 1998, this would increase the oil import bill in rich economies by only 0.25--0.5% of GDP. That is less than one-quarter of the income loss in 1974 or 1980. On the other hand, oil-importing emerging economies--to which heavy industry has shifted--have become more energy-intensive, and so could be more seriously squeezed.One more reason not to lose sleep over the rise in oil prices is that, unlike the rises in the 1970s, it has not occurred against the background of general commodity-price inflation and global excess demand. A sizable portion of the world is only just emerging from economic decline. The Economist’s commodity price index is broadly unchanging from a year ago. In 1973 commodity prices jumped by 70%, and in 1979 by almost 30%. The main reason for the latest rise of oil price is ().
A. global inflation
B. reduction in supply
C. fast growth in economy
D. Iraq’s suspension of exports
Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened (21) . As was discussed before, it was not (22) the 19th century that the newspaper became the dominant pre-electronic (23) , following in the wake of the pamphlet and the book and in the (24) of the periodical. It was during the same time that the communications revolution (25) up, beginning with transport, the railway, and leading (26) through the telegraph, the telephone, radio, and motion pictures (27) the 20th-century world of the motor car and the air plane. Not everyone sees that process in (28) . It is important to do so.It is generally recognized, (29) , that the introduction of the computer in the early 20th century, (30) by the invention of the integrated circuit during the 1960s, radically changed the process, (31) its impact on the media was not immediately (32) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (33) , with display becoming sharper and storage (34) increasing. They were thought of, like people, (35) generations, with the distance between generations much (36) .It was within the computer age that the term "information society" began to be widely used to describe the (37) within which we now live. The communications revolution has (38) both work and leisure and how we think and feel both about place and time, but there have been (39) view about its economic, political, social and cultural implications. "Benefits" have been weighed (40) "harmful" outcomes. And generalizations have proved difficult. 34().
A. ability
B. capability
C. capacity
D. faculty