题目内容
（请给出正确答案）
A．The length of the course.
B．The route the cyclists take.
C．The number of the participants.
D．The month in which the tour is held.
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B．glimpse
C．start
D．stare
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Today I'd like to continue to talk about the reason why the United States developed at such a high speed in the past 400 years; there are many factors. The land has an abundance of natural resources and includes some of the best farmland in the world. People from many countries settled there, bringing with them a wealth of knowledge and skills. But in the last 100 years it has been the workingman that has been the backbone of the nation.
What is the American workingman？ He's a worker in a shoe factory or a meat packing-house or a coal mine. But more than that, he's a husband and a father. He raised his children to understand the value of a day's work. He raised his children to respect the usefulness of cooperation. And he raised his children to help them better themselves. Seldom do their children forget the values they have learnt at home.
The workingman fought hard for almost ail his life to achieve what he has, but today the workingman is faced with a new kind of struggle. Ever-advancing technology is taking his job. It's very probable that the workingman will be replaced by a machine.
(31)
A．The United States is quite rich in natural resources.
B．The young Americans are well-educated to respect the usefulness of cooperation.
C．The Americans are the people with knowledge and skills from many countries.
D．The workingman is now enjoying the wonderful life he achieved through struggle.
Artificial intelligence aims to build machines that can think. One immediate problem is to define thought, which is harder than you might think. The specialists in the field of artificial intelligence complain, with some justification, that anything that their machines do is dismissed as not being thought. For example, computers can now play very, very good chess. They can't beat the greatest player in the world, but they can beat just about anybody else. If a human being played chess at this level, he or she would certainly be considered smart. Why not a machine？ The answer is that the machine doesn't do anything clever in playing chess. It uses its blinding speed to do a brute-force march of all possible moves for several moves ahead, evaluates the outcomes and picks the best. Humans don't play chess that way. They see patterns, which computers don't.
This wooden approach to thought characterizes machine intelligence. Computers have no judgment, no flexibility, no common sense. So-called expert systems, one of the hottest areas in artificial intelligence, aim to imitate the reasoning processes of human experts in a limited field, such as medical diagnosis(诊断) or weather forecasting. There may be limited commercial application for this sort of thing, but there is no way to make a machine that can think about anything under the sun, which a teenager can do.
The characteristic of artificial intelligence to date is that if a problem is severely restricted, a machine can achieve limited success. But when the problem is expanded to a realistic one, computers fall flat on their display screens. For example, machines can understand a few words spoken individually by a speaker that they have been trained to hear. They cannot understand continuous speech using an unlimited vocabulary spoken by just any speaker.
From the passage, we know that the writer ______.
A．thinks that scientists are on the point of achieving artificial intelligence
B．is in the full conviction that scientists have the competence to achieve artificial intelligence
C．remains doubtful of the fact that scientists have found real artificial intelligence
D．predicts with optimism that achieving artificial intelligence is now near at hand
A．The specialists' complaints can by no means be justified and should thus be dismissed.
B．A machine itself cannot be made to think in that it usually follows the procedures set in advance.
C．Humans generally use their wisdom to assess risks, evaluate the outcomes and make a sensible decision.
D．Machines are after all machines and they will never defeat human chess players.
A．Despite the great prospect some scientists hold, artificial intelligence has achieved a modest Success.
B．With its commercial application in medical diagnosis, artificial intelligence has made a greatest breakthrough.
C．Artificial intelligence has found a wide application in almost every field of society.
D．It is too ideal to be true to make a machine think like human beings.
A．common sense
B．flexibility
C．speech
D．rigid approach
The first man who cooked his food, instead of eating it raw, lived so long ago that we have no idea who he was or where he lived. We do know, 【C1】______ , that for thousands of years food was always eaten cold and 【C2】______ . Perhaps the cooked food was heated accidentally by a 【C3】______ fire or by the molten lava(熔岩) from an erupting(喷发的) 【C4】______ . When people first tasted food that had been cooked, they found it tasted better. However, 【C5】______ after this discovery, cooked food must have remained a rarity 【C6】______ man learned how to make and 【C7】______ fire.
Primitive men who lived in hot 【C8】______ could depend on the heat of the sun to cook their food. For example, in the desert areas of the southwestern United States, the Indians cooked their food by placing it on a flat 【C9】______ in the hot sun. They cooked pieces of meat and thin cakes of corn meal in this 【C10】______ We guess that the earliest kitchen 【C11】______ was a stick 【C12】______ which a piece of meat could be attached and held over a fire. Later this stick was 【C13】______ by an iron rod which could be turned frequently to cook the meat 【C14】______ all sides.
Cooking food in water was 【C15】______ before man learned to make water containers that could not be 【C16】______ by fire. The 【C17】______ cooking pots were reed or grass baskets in which soups and stews could be cooked. 【C18】______ 166 B. C. the Egyptians had learned to make mere 【C19】______ cooking pots out of sandstone. Many years later, the Eskimos learned to make 【C20】______ pans.
【C1】
A．thus
B．however
C．otherwise
D．consequently
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