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西安交通大学听力93篇dictation56-93

西安交通大学听力93篇dictation56-93
西安交通大学听力93篇dictation56-93

56. A False Alarm

Last night I have a frightening experience. While I was eating at a fast-food restaurant, the manager came to announce that everybody would have to leave the building because a bomb was reported to be hidden somewhere in the restaurant. When the announcement was made, the place was immediately thrown into confusion as everyone was determined to get out first. To make matters worse, an elderly woman, who must have weighed 300 pounds, had just come up to the entrance, which was also the only exit. In the meantime, I suddenly remembered that I have left my purse in the chair in which I was sitting. It was certainly not convenient now to return to get it. When I finally managed to get my purse and go outside, I saw the police had arrived and were searching the area. Eventually they determined that it had been all a false alarm.

57. Air-conditioning

With air-conditioning, you can be comfortable anywhere indoors even on the hottest summer day. Inventors had been trying to come up with methods of keeping the air cool. There were hundreds of ideas, but none of them really worked.

The first machine was developed by Willis H. Carrier, who is often called “the father of air-conditioning”. He built the machine for a printing plant in New York. Soon air-conditioning was being used in many factories. But the public did not really know about this invention until the 1920s when movie theatres, department stores and restaurant had air conditioners installed. As air conditioners became popular during the 1930s, central air-conditioning systems were developed. A whole office or department building could be cooled from one unit. After World Wa r Ⅱ,large numbers of air conditioners began to be used in both public buildings and private homes.

58. Helen Keller

Helen Keller was born in 1880 into a middle-class family. Her father was a newspaper editor. They lived in a comfortable house on a farm. From the time she lost her eyesight and hearing until she was nearly seven, she was cared for by her loving family, who allowed her uncontrolled freedom around the home. She had the servants’ children as playmates, and she ruled them as a little queen. She did not sit at the table at dinner, but wandered around helping herself to food from other people’s plates. Without any discipline, she grew up to be a little wild animal. She behaved very badly if anyone prevented her from doing or having what she wanted.

But later with the help of her teacher, Ellen Keller managed to

overcome the double disabilities of blindness and deafness and became one of the most remarkable persons in the nineteenth century.

59. The Submarine

Trying to describe a submarine is like trying to describe an automobile. There are dozens of different kinds of automobiles and each is different from any other. So a description of any one automobile would fail to describe the rest. And yet all automobiles are alike in the most important things: all have engines, wheels, steering devices, and certain other vital parts. And a description of a sort of “average” automobile would in some way describe all others.

The same is true of submarines. There are many kinds and sizes, but all work basically the same way and all must have the equipment necessary for sailing, for diving beneath the sea, for communicating with their home bases, for housing and feeding a crew and so on. So it is possible to describe a sort of “average” submarine in a way that will tell something about all submarines and how they will operate.

60. Motel

The word “motel”means motorist hotel and it is used chiefly by people traveling by car. Parking space is always available. Motels are usually outside the center of town near major roads and are less expensive than hotels. Rates in motels are about$10 to $15 per person a day for a room and bath. Motels in and near large cities tend to be more expensive. In smaller towns the price may be lower. Because motels are often located outside the centre of town, it will probably be inconvenient to stay in a motel unless you have a car or unless the motel is located near public bus or train lines. Although reservations in advance are usually required in motels in busy areas, this is not always the case in less crowded parts of the country. Because of their convenience and economical prices, it is easy to understand why they are so popular with Americans.

61. Shrinking Families Challenge Tradition

It has been a Chinese tradition for several generations to live under the same roof. However, this tradition is being challenged by new ideas brought about by economic development in the last decade. The concept of an extended family is disappearing in china.

Experts point out that the traditionally large families are splitting into smaller nuclear families. Along with one-child families, there are single-parent families and “dink”families. “Dink”stands for “double-income-no-kid”.

Single parent families are the result of the increasing divorce rate, which has caused problems in child care and education. As more and

more women are working outside the home, they choose either not to have children or leave their children in the care of grandparents. Thus, the number of “dink” families and families in which grandparents live with their grandchildren is on the rise.

62. How Your Memory Works

In all human communication, information is transferred from one person’s memory to another’s. No matter how the message is sent, it must arrive in a form that can be understood, held and recalled later by the brain. How do these three memory processes function? Before answering this question, we need to consider the fact that there are two kinds of memory: short-term and long-term memory.

Your short-term memory can hold only five to seven items of information such as five numbers, six words, or seven syllables. However, unless you repeat that information to yourself over and over again, you will forget it in less than a minute. This temporary memory is used when you try to remember a name or telephone number that someone told you a moment ago. Short-term memory plays an important part in thinking and understanding.

63. The United Nations

The most important international organization is the United Nations, created at the end of World Wa rⅡby the victorious allies. When it was established in 1945, the United Nations comprised 49 states. But by the early 1990s it had grown to 159 members.

However, the United Nations is now frequently criticized for various reasons. It is criticized, for example, for failing to keep world peace. Members can vote to establish a peace-keeping force and request states to contribute soldiers. However, any one of the five permanent members of the Security Council may veto the operation. It is also attacked for being one-sided on a number of world issues. Yet, with all its weakness, the United Nations still represents a place where for the first time in human history nearly all states of the world can meet and vote on important issues.

64. A Change of Interests on Campus in China

There has been a change of interests on campus in recent years. Many excellent students used to show a great interest in liberal arts. To become a writer was their life-long dream. Now, top students go in for computer science, business studies and other subjects concerning finance. Obviously, they believe if they master such subjects they are more likely to get well-paid jobs in the future. Moreover, students display greater enthusiasm than ever for learning English. A good command of the language will open up new windows for them and help widen their scope

of knowledge. Besides, with the carrying out of the open-door policy and the rapid development of our economy, more and more companies have business ties with foreign firms. So university graduates with a good knowledge of English will find it easier to win good positions.

65. Education in America

Life in the twentieth century demands preparation. Today, all individuals must have adequate schooling to prepare them for their work and for their responsibilities as citizens. In America, government officials, parents, and teachers are working hard to give the children the best preparation available. There is no national school policy in the US. Each state makes its own education rules and regulations, but there are many similarities among the school systems. Public schools in all states are supported by taxes paid by the citizens of the individual state. In most states, the children are required to attend school until they reach sixteen. When they become six years old, children begin elementary school. After six years in elementary school, they go into junior high school and remain there for three years. The last three years of their public school education are spent in senior high school, from which they graduate at the age of eighteen.

66. Work and Career

Sometimes we say that someone we know is “a square peg in a round hole”. This simply means that the person is not suited for his job. He may be a bookkeeper who really wants to be an actor, or a mechanic who likes cooking. Unfortunately, many people in the world are square pegs who are not doing the kind of work they should be doing. Most of us spent a great part of our lives at our jobs. For that reason we should try to find out what our talents are and how we can use them. There are many careers open to each of us. Perhaps we like science. Then we might prepare ourselves to be chemists, physicists, or biologists. Maybe our interests take us into the business world or the medical profession. Teaching, newspaper work and engineering—these and many other fields all offer satisfying careers to person with talent and training.

67. Automobiles

It is impossible to say that any one man invented the automobile. Many individuals living and working in different counties and at different times contributed to its development. Many of the discoveries that went into the creation of the automobile were small in themselves. But together they were important. Here are two examples.

On Christmas Eve 1801, the silence of the English countryside was shattered by a steam-powered carriage running at a speed of 8 to 9 miles

an hour—almost unheard of in those days. According to automobile historians, this was the first practical use of mechanical power to move a vehicle. After its first run, the machine reportedly burned up while the inventor and his friends were celebrating its success at a pub.

Henry Ford is considered the father of modern automobile mass production. His famous Model T car, because of its low price, made it possible to produce cars on a large scale.

68. Automation

For thousands of years man has been busy making tools and machines to make his work easier. Automation is the latest stage in this process of replacing manpower with machines.

Automation is as up-to-date as space flight, yet some of the ideas behind it are nearly 200 years old. The steam engine invented in 1784 is one of the first examples of the automatic control of machinery. A big step toward automation was taken when the first electronic computer was devised by American scientists during World WarⅡ.

Automation is not the same as mechanization. With mechanization, workers are still needed to operate the machines. With automation, the machines are controlled by other machines, without a human worker.

Not all things can be done by automation. The machine will not replace man in tasks that involve the use of judgement, imagination, artistic creation and personal career or service.

69. Newspapers

Almost every family buys at least one copy of a newspaper every day. Why do people read newspapers?

Five hundred years ago, news of important happenings took months and even years to travel from one country to another. Today we can read in our newspapers of important events that occur in faraway countries on the same day they happen.

Apart from supplying news from all over the world, newspapers give us a lot of other useful information. There are weather reports, TV and film guides, book reviews, and, of course, advertisements. Companies pay newspapers thousands of dollars for the advertising space, but it is worth the money, for news of their products goes into almost every home in the country. For those who publish newspapers, advertisements are also very important. Money earned from the advertisements make it possible for them to sell their newspapers at a low price and still make a profit.

70. The Source of Energy

All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood. Coal, oil, natural gas, and all other fuels are stored-up energy from the sun. Some was collected by this season’s plants as carbon compounds. Some was stored by plants and trees ages ago. Even waterpower derives from the sun. Water turned into vapor by the sun falls as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun’s outer layers, and much of this energy that is directed toward the earth never arrives. About nine-tenth of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only half-billion of the sun’s entire output of the radiant energy.

71. The Influence of Fire

In the early times when human beings hunted and gathered food, they were not in control of their environment. They could only interact with their surroundings as the other lower animals did. When they learned to make fire, however, they became capable of altering their environment. To provide themselves with fuel, they cut down trees. They also burned clearings in forests to increase the growth of grass and to provide a greater grazing area for the wild animals that human beings fed upon. This development led to farming and the domestication of animals. Fire also provided the means for cooking plants which had previously been inedible. Only when the process of meeting the basic need for food reached a certain level was it possible for humans to follow other pursuits such as setting up families, forming societies and founding cities.

72. A Dream Laboratory

There is a dream laboratory at the University of Chicago where researchers are studying dreamers. Their findings have revealed that everyone dreams from three to seven times a night, although in ordinary life a person may remember none or only one of his dreams.

While the subjects are asleep, special machines record their brain waves and eye movements as well as body movements that signal the end of the dream.

Observers report that a person usually appears restless before a dream. Once the dream has started, his body relaxes and his eyes become more active. As soon as the machines indicate that the dream is over, the sleeper is awakened.

Researchers have found that if the dreamer is awakened immediately after his dream, he can usually recall the entire dream. If he is allowed to

sleep even five more minutes his memory of the dream will have faded.

73. Qualifications for a Flight Attendant

One of the most important qualifications for flight attendants is education. Applicants must have at least a high school education to be accepted by any airline. And while this is a minimum requirement, most airlines prefer either some college education or a year or two of business experience.

Most international airlines consider fluency in a language an important factor, and a few have special language requirements. A flight attendant must, of course, speak the language of the country in which the airline is based. The large international airlines require fluency in English. Most of them have some additional requirements as well depending on where they fly.

In some cases, the language requirement can be met at some time during service, and the airline helps the attendant to learn a second or a third language by providing special classes. Language classes are sometimes part of the training program.

74. Another Route to Take

The United States is well known for its network of major highways designed to help a driver get from one place to anther in the shortest possible time. Although these wide modern roads are generally smooth, straight and well-maintained, a direct route is not always the most enjoyable one. These highways generally connect large urban centers, which means that they often become crowded with heavy traffic during rush hours, when the “fast, direct way” becomes a very slow route.

However, there is almost always another route to take if you are not in a hurry. Not far from the new “superhighways”, there are often older, less heavily traveled roads which go through the countryside. These secondary routes may go up steep slopes, along high cliffs, or down frightening hillsides to towns lying in deep valleys. Through these indirect, longer routes, the drivers may have a chance to get a fresh, clean view of the world.

75. Living in an Apartment

Living in an apartment while attending college is advantageous for many students because it helps them to develop maturity. For one thing, it promotes self-confidence and self-reliance. To manage apartment living successfully, students have to do their own washing and cleaning, and buy and cook their own food. Since they are faced with expenditures they

didn’t have at home, such as rent, utility bills, food and furniture, they must also learn to budget their money and spend it wisely. If they do, they will take an important step along the road to maturity. Finally, living in an apartment stimulates pride of ownership. Decorating and furnishing an apartment, however simply, requires thought and taste in the purchase and arrangement of furniture and other things. Those who have invested their time and energy in acquiring such possessions are apt to take care of them.

76. Newspapers and Magazines

Most British people begin their day by reading newspapers. In this way they learn what is going on in the world. Sometimes, however, they don’t have time to read the news carefully and must be satisfied with a quick look at the front page. There are newspapers to satisfy every reader. In big cities, there are many types of papers with several different editions every day. In small towns, there are fewer newspapers and perhaps only one edition each day. Most newspapers have several sections, especially on Sundays, when the edition is larger than usual. There are , in addition to the front page, the sports section, the amusement section and so on. Another type of publication which helps keep the population informed is the magazine. There are news magazines, literary magazines and magazines for a wide range of other interests. In Britain, there are publication for every taste and interest.

77. Media for Advertising

The Western world is filled with advertisements, for advertising is a good way to persuade people to buy goods or services.

Different media are used to reach the public. The most important one is television. Because it combines sight, sound, movement and color, television gives advertisers many ways of catching customers’ attention. TV programs are interrupted every five minutes with commercials telling people to buy a certain make of car, or to drink a different kind of beer.

Advertisers also use different magazines to advertise products for different readers. Women’s magazines, for example, are full of ads showing models dressed in the latest style.

Newspapers have their own advantages. They are the most flexible of the media and are very general in their advertising.

People can also find advertisements in a form of posters almost everywhere, on walls by both sides of the street, on building and even on buses.

78. Different Dictionaries

There are different kinds of dictionaries. You need to know what kind you are using and what help you can get from it.

Desk dictionaries are one-volume, general purpose dictionaries. They vary in size and, therefore, in scope, but they are the most useful tools for the user. From the desk dictionary you can get information about meaning, spelling, pronunciation and grammar.

Library dictionaries are also general purpose dictionaries, yet they supply the information that is lacking in the smaller desk dictionaries. It should be available in your public library and can be found in some college libraries.

Specialist dictionaries provide the information that neither desk dictionaries nor even library dictionaries attempt to give. Every trade, profession and business now has an extensive vocabulary of its own. The specialist dictionaries supply most of our needs in the specialized areas.

79. The Heart of Drama

Hollywood produces many kinds of films, including mysteries, musicals, love stories and horror films. Different these films may be, they have one thing in common--conflict. The main character wants something badly and will do anything to get it. The opponent tries to stop him from achieving his goal. This opposition creates conflict, which is the heart of drama. For example, the main character is a young man of humble origin who wants to marry the daughter of a rich banker. The father thinks the man unworthy of his daughter and doesn’t allow her to see him. The young man, deeply in love, nevertheless refuses to give up without a fight. The conflict between the young man and the banker makes the story interesting. In a good story, the main character changes. He learns something from his experiences and become a different, perhaps, a better person.

80. The Difference between Radio and TV Commentators

When television first began to expand, very few famous radio commentators were able to be effective on television. When working on radio, they had become accustomed to seeing on behalf of the listener. This art of seeing for others means that the commentator has to be very good at talking. Above all, he has to be able to create a continual sequence of visual images which add meaning to the sounds which the listener hears. In the case of television, however, the commentator sees everything with the viewer. His role, therefore, is completely different. He is there to make sure that the viewer dose not miss some point of

interest, to help them focus on particular things, and to interpret the images on the television screen. Unlike his radio colleague, he must know the value of silence and how to use it at those moments when the pictures speak for themselves.

81. The Influence of Science on People’s Life

If you compare the life of people today with that before the industrial revolution, you will see that science has done a great deal to improve the quality of life. People now travel in cars, buses, trains and airplanes which bring distant places within reach in a matter of hours. With the invention of radio and TV, people can now stay at home and still keep themselves well informed. One doesn’t need to go to a theater to see a play or go to the remote parts of the world to see the strange customs of some primitive tribes. A variety of programs bring them right into your living-room. Refrigerators, washing machines, and microwave ovens have made housekeeping so much easier that women can pursue their own careers without neglecting the duties of a good wife and mother. Indeed, with the advance of science, we can look forward to greater conveniences and comforts which, even today, seem quite unimaginable.

82. The Efficient Use of Resources

Human actions may result in more efficient use of some resources, rather than their destruction. One dramatic example of human efforts to make more efficient use of available resources is the increasing capacity of the earth’s surface to provide food. The ratio of population to food supply has become more favorable in many regions. This is especially so in Asia, where population growth has slowed while food supply has grown. The challenge in these regions is to continue recent progress by further expanding food resources. In other regions, especially Africa, the problem is getting worse. Food supply must be quickly expanded to meet the needs of the rapidly expanding population. In order to increase the food supply, we can either expand the land area used for agriculture, or increase the productivity of land now used for agriculture. In some cases, people can find new food sources or increase exports from other countries.

83. Human Action and Pollution

Human actions can destroy resources. When we produce goods and services that are supposed to improve our health, we may destroy resources. We misuse resources such as air and water by regarding them

as unlimited, unchanging, and freely available for use in the production of goods and services.

Not all human actions harm the physical environment. Every resource has the capacity to accept some human abuse. Harmful effects result when human generate more waste than the resource is capable of accommodating. Human action that negatively affects a resource is known as pollution. Pollution varies from region to region according to the types of human actions. In general, we find high levels of pollution in regions of population concentration. Pollution also varies according to levels of economic development. Most pollution is a by-product of production in relatively developed economies.

84. The Reforming in Britain’s Secondary Education

The changes in British education have been tremendous, though this has not been true of elementary education, where the problems were largely those of coping with a growing number of children. Issues in secondary education have been more controversial. The system in operation before the war sorted out the children at the age of 11and placed them in grammar schools according to their abilities and interests. This system was criticized on the ground that a child’s capabilities could not be judged accurately when the child was only 11 years of age. An answer has been found in the establishment of comprehensive schools which offer all types of education and permit children to pass from one type to another according to their abilities. The school leaving age has been raised to 15 by an act of 1944; a further rise to 16, recommended in 1959, is now in affect.

85. Climate

Climate is the long-term average weather condition at a particular location. Geographers frequently divide the world into five main climate regions, namely, tropical climates, try climates, warm climates, snow climates and ice climates. Traditionally, humans find it difficult to tolerate extreme temperatures or rainfall and thus avoid living in places that are too hot, too cold, too wet or too dry. Relatively large numbers of people live in the warm climate region. The dry climate region is less intensively settled. The climate of a particular location influences human activities, especially production of the food needed to survive. From one generation to the next, people learn that different crops grow in different climates. Rice, for example, requires a god deal of water, whereas wheat survives on a limited amount. And rice grows better in warm climates, while wheat is more likely to be grown successfully in colder climates.

86. Smoking

In America, “no smoking” signs are going up in public places, such as theaters and cinemas, schools and libraries, airplanes and buses. The right of the non-smoking majority to smoke free air is increasingly being protected by law.

In the past two years, many states and cities have limited smoking in public places. An increasing number of restaurants and other private enterprises have voluntarily introduced smoking regulations for health reasons. A dozen ice cream shops in New York have set up none- smoking sections and there seems to be more demand for seats there in smoking sections.

The new smoking restrictions started to appear in 1972 after a medical report warned the public of the dangers of passive smoking. The report said, nonsmokers, particularly people with heart or lung problems, might be exposed to harmful concentrations of smoke.

87. Our Demanding Dog Friends

Most people have had a dog or wanted one as their companion at some time in their lives. If you are thinking of buying a dog, however, you should first decide what sort of companion you need. Most breeds were originally developed to perform specific tasks. So, if you want a dog to protect you or your house, for example, you should choose a breed that has the right size and characteristics. You must also be ready to devote a good deal of time to train the dog when it is young and give it the exercise it needs throughout its life. Dogs are demanding pets. If baby dogs have not established a relationship with the human beings until they are over three months old, their strong relationships will always be with dogs. They are likely to be too shy when they are brought out into the world to become good pets.

88. American “Invasion” of Europe

Traveling and living in Europe has become increasingly popular with Americans since the end of world wa rⅡ. Some seek escape from the hurry and worry of contemporary American life. They seek the more leisurely, culturally richer life which they hope to find in such cities as pairs, London and Rome. The increase in the number of American business and factories in Europe has dramatically increased the size of American “colonies” in foreign countries. In fact, American businessmen comprise the largest group of Americans living in Europe. A third group consists of U.S. government employees, technical experts, and those sent to administer trade and aid programs. And, finally, college-age youth

travel to Europe for study, fun or adventure. This flow of Americans, however, has not been universally welcomed by the people of the host countries. In fact, some European critics complain that this new American “invasion” is corrupting European life.

89. Noise and Animals

A team of scientists recently began a project to measure the effects of noises on sea-animals. If noises prove harmless to the animals, then the researchers can proceed with a plan to transmit sound waves through the Pacific to take the earth’s temperature. Sound travels faster through warm water than cold water. By analyzing the speed of sound through the ocean, scientists can determine if our planet is warming up. The experiment was nearly cancelled for the fear that the sound will harm the sea-animals. So scientists are conducting tests on the animals first. Scientists lowered a loud speaker that transmitted sound waves into the ocean and kept track of the animal’s movements. If sea-animals are distressed by the sounds, they would swim away from the speaker. So far, however, there aren’t any signs that the animals are being harmed. Researchers noticed that a large number of sea-animals swim near the speaker whether it was turned on or off.

90. After-school Activities

In addition to their academic work, children in the United States are offered a wide range of activities in after-class hours. These are designed to help broaden their skills, abilities and appreciation of life, and to give them a chance to practice leadership and assume responsibilities. There is often a wide range of activities from which to choose, such as nature clubs, science clubs, or art and drama groups. A wide selection of sport activities is always available. Some of these activities take place during the school day, but many are held after classes are over. Even though they are optional, they are considered a part of the American educational experience and parents encourage their children to participate.

Both employers and college admission officers in the United States carefully consider the after-class activities in which students have participated. These indicate their leadership potential, enthusiasm, creativity, and breadth of interest.

91. American English and British English

Why is the English language used in the United States so different from that used in England? The answer is that the United States grew in

isolation from England. Separated by the Atlantic, the United States and England developed their languages with little influence from each other.

The English of the United States differs from that of England in vocabulary, spelling and pronunciation. The vocabulary is different largely because U.S settlers encountered many unfamiliar objects and experiences. Spelling differs from the British standard because of a strong national feeling in the United States for an independent identity. Differences in pronunciation between British and U.S speakers are striking. From the time of their arrival in North American, colonists began to pronounce words differently from the British. Such a difference is normal, since communication between the two groups was largely confined to exchange of letters and other printed matter rather than by direct speech.

92. American Restaurants

Because there are so many different nationalities in America, visitors can find almost any kind of restaurant in most of the large cities. Restaurants in large cities vary greatly in price. Many restaurants post their menus in the window so that you can have some idea of the price of food before you enter. If the menu is not posted, and you are uncertain about how expensive the place is, ask to see the menu before you are seated at a table, or just ask about the price range. Appearances from the outside can be misleading----what looks like a small, informal restaurant may really be very expensive and what looks like a large, expensive restaurant may be very reasonable.

You can get a meal for about$2 or slightly more if you eat in snack bars or coffee shops, but in most city restaurants you should expect to pay $6 to $8 a person for dinner, with alcoholic drinks and wine extra.

93. The Functions of the Family

The family fulfills a number of roles, such as providing education and recreational activities. Yet there are several major functions performed by the family. First, unlike the young of animals, human infants need constant care and economic security. In all cultures, the family assumes ultimate responsibility for the protection of children. Second, parents monitor a child’s behavior and transmit the values and language of a culture to the child. Third, ideally, the family provides members with warm and intimate relationships and helps them to feel satisfied and secure. Unlike other institutions, the family is obliged to serve the emotional needs of its members. Finally, family resources affect

children’s ability to pursue certain opportunities such as higher education and specialized study. It is apparent, then, that the family has been assigned at least four vital functions within human societies.

统计西安交大期末考试试题(含答案)

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目录 题目一------------------------------------------------------------------------------------------ - 4 - 1.1题目内容 ---------------------------------------------------------------------------- - 4 - 1.2算法思想 ---------------------------------------------------------------------------- - 4 - 1.3Matlab源程序----------------------------------------------------------------------- - 5 - 1.4计算结果及总结 ------------------------------------------------------------------- - 5 - 题目二------------------------------------------------------------------------------------------ - 7 - 2.1题目内容 ---------------------------------------------------------------------------- - 7 - 2.2算法思想 ---------------------------------------------------------------------------- - 7 - 2.3 Matlab源程序---------------------------------------------------------------------- - 8 - 2.4计算结果及总结 ------------------------------------------------------------------- - 9 - 题目三----------------------------------------------------------------------------------------- - 11 - 3.1题目内容 --------------------------------------------------------------------------- - 11 - 3.2算法思想 --------------------------------------------------------------------------- - 11 - 3.3Matlab源程序---------------------------------------------------------------------- - 13 - 3.4计算结果及总结 ------------------------------------------------------------------ - 14 - 题目四----------------------------------------------------------------------------------------- - 15 - 4.1题目内容 --------------------------------------------------------------------------- - 15 - 4.2算法思想 --------------------------------------------------------------------------- - 15 - 4.3Matlab源程序---------------------------------------------------------------------- - 15 - 4.4计算结果及总结 ------------------------------------------------------------------ - 16 - 题目五----------------------------------------------------------------------------------------- - 18 -

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