华师大《综合英语（6）》在线作业

奥鹏华中师范大学平时在线作业

华师《综合英语（6）》在线作业-0004

Foxes and farmers have never got on well. These small dog-like animals have long been accused of killing farm animals. They are officially classified as harmful and farmers try to keep their numbers down by shooting or poisoning them. Farmers can also call on the services of their local hunt to control the fox population. Hunting consists of pursuing a fox across the countryside, with a group of specially trained dogs, followed by men and women riding horses. When the dogs eventually catch the fox they kill it or a hunter shoots it. People who take part in hunting think of it as a sport; they wear a special uniform of red coats and white trousers, and follow strict codes of behavior. But owning a horse and hunting regularly is expensive, so most hunters are wealthy. It is estimated that up to 100,000 people watch or take part in fox hunting. But over the last couple of decades the number of people opposed to fox hunting, because they think it is brutal, has risen sharply. Nowadays it is rare for a hunt to pass off without some kind of confrontation (冲突) between hunters and hunt saboteurs (阻拦者). Sometimes these incidents lead to violence, but mostly saboteurs interfere with the hunt by misleading riders and disturbing the trail of the fox's smell, which the dogs follow. Noisy confrontations between hunters and saboteurs have become so common that they are almost as much a part of hunting as the pursuit of foxes itself. But this year supporters of fox hunting face a much bigger threat to their sport. A Labour Party Member of the Parliament, Mike Foster, is trying to get Parliament to approve a new law which will make the hunting of wild animals with dogs illegal. If the law is passed, wild animals like foxes will be protected under the ban in Britain.
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Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of urban travel in the foreseeable future.The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types.Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion (拥挤). One proposed solution to this problem is the automated highway system. When the auto enters the highway system, a retractable (可伸缩的) arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer. The computer will then monitor all of the car's movements. The driver will use a telephone to dial instructions about his destination into the system. The computer will calculate the best route, and reserve space for the car all the way to the correct exit from the highway. The driver will then be free to relax and wait for the buzzer (蜂鸣器) that will warn him of his coming exit. It is estimated that an automated highway will be able to handle 10,000 vehicles per hour, compared with the 1,500 to 2,000 vehicles that can be carried by a present-day highway.
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We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alternation with some 16-17 hour's wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified.The question is no mere academic one. The ease, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls for round-the-clock working of machines. It normally, takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently.The only real solution appears to be to hand over the night shift to a number of permanent night workers. An interesting study of the domestic life and health of night-shifty workers was carried out by Brown in 1957. She found a high incidence of disturbed sleep and other disorders among those on alternating day and night shifts, but no abnormal occurrence of these phenomena among those on permanent night work.This latter system then appears to be the best long-term policy, but meanwhile something may be done to relieve the strains of alternate day and night work by selecting those people who can adapt most quickly to the changes of routine. One way of knowing when a person has adapted is by measuring his body temperature. People engaged in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night; when they change to night work the pattern will only gradually go back match the new routine and the speed with which it does so parallels, broadly speaking, the adaptation of the body as a whole, particularly in terms of performance. Therefore, by taking body temperature at intervals of two hours throughout the period of wakefulness it can be seen how quickly a person can adapt to a reversed routine, and this could be used as a basis for selection. So far, however, such a form of selection does not seem to have been applied in practice.
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In the days immediately following hurricane Andrew's deadly visit to South Florida, Allstate Insurance hastily dispatched more than 2,000 extra claim adjusters to the devastated area to assist the 200 stationed there. Many of the reserves arrived in convoys of motor homes. Others flew in state rushed to set up its own communications system. Allstate expects to pay out '1.2 billion to cover more than 121,000 damage claims as a result of Andrew.All told, U.S. property and casualty insurers have been hit with more than '8 billion in Andrew related claims, making the hurricane the most costly single calamity to strike the industry since the San Francisco earthquake and fire in 1906(cost:'6 billion, after inflation). With claims continuing to pour in, Andrew threatens to take a painful toll on the already battered property casualty insurance industry and its 100 million policy holders. The final bill, analysts predict, is likely to top '10 billion, While most well capitalized insurers are expected to weather the storm, less anchored firms are in danger of being blown away, leaving U.S. consumers stuck with the tab. Says Sean Mooney digs itself out from the wreckage left by Andrew. Some [companies] will be buried by it.Hurricane Andrew is the latest in a string of mishaps to plague the American insurance industry this year. In April an overflowing Chicago River flooded the city's downtown district, costing insurers '300 million in claims. A month later, Los Angeles was rocked by the worst civilian riot in the U.S. since the Civil War. The insurance toll: '1 billion. Then came a series of major hailstorms in Texas, Florida and Kansas. They cost insurers a combined '700 million. And two weeks after Andrew, another lethal hurricane, Iniki, smashed into Hawaii, causing '1.4 billion in damages. In all, property and casualty insurers have paid out a record '13 billion in claims so far this year, far surpassing the previous high of '7.6 billion in 1989, the year of Hurricane Hugo and California's Bay Area earthquake. Just as in that year when those catastrophes were followed by substantial increases in insurance premiums, insurers are already lobbying for rate relief.
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Every profession or trade, every art, and every science has its technical vocabulary. Different occupations, however, differ widely in the character of their special vocabularies. In trades and handicrafts, and other vocations, like farming and fishery, that have occupied great numbers of men from remote times, the technical vocabulary, is very old. It consists largely of native words, or of borrowed words that have worked themselves into the very fiber of our language. Hence, though highly technical in many particulars, these vocabularies are more familiar in sound, and more generally understood, than most other technicalities. The special dialects of law, medicine, divinity, and philosophy have also, in their older strata, become pretty familiar to cultivated persons and have contributed much to the popular vocabulary. Yet every vocation still possesses a large body of technical terms that remain essentially foreign, even to educated speech. And the proportion has been much increased in the last fifty years, particularly in the various departments of natural and political science and in the mechanic arts. Here new terms are coined with the greatest freedom, and abandoned with indifference when they have served their turn. Most of the new coinages are confined to special discussions, and seldom get into general literature or conversation. Yet no profession is nowadays, as all professions once were, a close guild（行会）.The lawyer, the physician, the man of science, the divine, associated freely with his fellow-creatures, and does not meet them in a merely professional way. Furthermore, what is called popular science makes everybody acquainted with modern views and recent discoveries. Any important experiment, though made in a remote or provincial laboratory, is at once reported in the newspapers, and everybody is soon talking about it — as in the case of the Roentgen rays and wireless telegraphy. Thus our common speech is always taking up new technical terms and making them commonplace.
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It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict. If the things to be found are actually new, they are by definition unknown in advance. You cannot make choices in this matter. You either have science or you don't, and if you have it you are obliged to accept the surprising and disturbing pieces of information, along with the neat and promptly useful bits.The only solid piece of scientific truth about which I feel totally confident is that we are profoundly ignorant about nature. Indeed, I regard this as the major discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we know and how bewildering seems the way ahead. It is this sudden confrontation with the depth and scope of ignorance that represents the most significant contribution of the 20th century science to the human intellect. In earlier times, we either pretended to understand how things worked or ignored the problem, or simply made up stories to fill the gaps. Now that we have begun exploring in earnest, we are getting glimpses of how huge the questions are, and how far from being answered. Because of this, we are depressed. It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad spots, but no true light at the end of the tunnel nor even any tunnels that can yet be trusted.But we are making a beginning, and there ought to be some satisfaction. There are probably no questions we can think up that can't be answered, sooner or later, including even the matter of consciousness. To be sure, there may well be questions we can't think up, ever, and therefore limits to the reach of human intellect, but that is another matter. Within our limits, we should be able to work our way through to all our answers, if we keep at it long enough, and pay attention.
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Of all the areas of learning the most important is the development of attitudes. Emotional reactions as well as logical thought processes affect the behavior of most people.The burnt child fears the fire is one instance; another is the rise of despots like Hitler. Both these examples also point up the fact that attitudes stem from experience. In the one case the experience was direct and impressive; in the other it was indirect and cumulative. The Nazis were indoctrinated largely by the speeches they heard and the books they read.The classroom teacher in the elementary school is in a strategic position to influence attitudes. This is true partly because children acquire attitudes from those adults whose word they respect.Another reason, it is true, is that pupils often delve somewhat deeply into a subject in school that has only been touched upon at home or has possibly ever occurred to them before. To a child who had previously acquired little knowledge of Mexico, his teacher's method of handling such a unit would greatly affect his attitude toward Mexicans.The media through which the teacher can develop wholesome attitudes are innumerable. Social studies, science matters of health and safety, the very atmosphere of the classroom … these are a few of the fertile fields for the inculcation (反复灌输) of proper emotional reactions.However, when children come to school with undesirable attitudes, it is unwise for the teacher to attempt to change their feelings by scolding them. She achieve the proper effect by helping them obtain constructive experiences.Finally, a teacher must constantly evaluate her own attitudes, because her influence can be deleterious (有害的) if she has personal prejudices. This is especially true in respect to controversial issues and questions on which children should be encouraged to reach their own decisions as a result of objective analysis of all the facts.
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The average population density of the world is 47 persons per square mile. Continental densities range from no permanent inhabitants in Antarctica to 211 per square mile in Europe. In the Western Hemisphere, population densities range from about 4 per square mile in Canada to 675 per square mile in Puerto Rico. In Europe the range is from 4 per square mile in Iceland to 831 per square mile in the Netherlands. Within countries there are wide variations of population densities. For example, in Egypt, the average is 55 persons per square mile, but 1,300 persons inhabit each square mile in settled portions where the land is arable. High population densities generally occur in regions of developed industrialization, such as the Netherlands, Belgium, and Great Britain, or where lands are intensively used for agriculture, as in Puerto Rico and Java.Low average population densities are characteristic of most underdeveloped countries. Low density of population is generally associated with a relatively low percentage of cultivated land. This generally results from poor quality lands. It may also be due to natural obstacles to cultivation, such as deserts, mountains or malaria-infested jungles; to land uses other than cultivation, as pasture and forested land; to primitive methods that limit cultivation; to social obstacles; and to land ownership systems which keep land out of production. More economically advanced countries of low population density have, as a rule, large proportions of their populations living in urban areas. Their rural population densities are usually very low. Poorer developed countries of correspondingly low general population density, on the other hand, often have a concentration of rural population living on arable land, which is as great as the rural concentration found in the most densely populated industrial countries.
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The work conservation has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such a good condition that others may also share the enjoyment. Our forefathers had no idea that human population would increase faster then the supplies of raw materials; most of them, even until very recently, had the foolish idea that the treasures were limitless and inexhaustible. Most of the citizens of earlier generations knew little or nothing about the complicated and delicate system that runs all through nature, and which means that, as in a living body, and unhealthy condition of one part will sooner or later be harmful to all the others.Fifty years ago nature study was not part of the school; scientific forestry was a new idea; timber was still cheap because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had yet studied long-term climatic cycles in relation to proper land use; even the word conservation had nothing of the meaning that it has for us today.For the sake of ourselves and those who wil come after us, we must now set about repairing the mistakes of our forefathers. Conservation should, therefore, be made a part of everyone's daily life. To know about the water table in the ground is just as important to us as a knowledge of the basic arithmetic formulas. We need to know why all watersheds need the protection of plant life and why the running current of streams and rivers must be made to yield their full benefit to the soil before they finally escape to the sea. We need to know the importance of big, mature trees, because living space for most of man's fellow creatures on this planet is figured not only in square measure of surface but also in cubic volume above the earth. In brief, it should be our goal to restore as much of the original beauty of nature as we can.
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The relationship between the home and market economies has gone through two distinct stages. Early industrialization began the process of transferring some production processes (e.g. clothmaking, sewing and canning foods) from the home to the marketplace. Although the home economy could still produce these goods, the processes were laborious and the market economy was usually more efficient. Soon, the more important second stage was evidentthe marketplace began producing goods and services that had never been produced by the home economy, and the home economy was unable to produce them (eg. electricity and electrical appliances, the automobile, advanced education, sophisticated medical care). In the second stage, the question of whether the home economy was less efficient in producing these new goods and services was irrelevant; if the family were to enjoy these fruits of industrialization, they would have to be obtained in the marketplace. The traditional ways of taking care of these needs in the home, such as in nursing the sick, became socially unacceptable (and, in most serious cases, probably less successful). Just as the appearance of the automobile made the use of the horse-drawn carriage illegal and then impractical, and the appearance of television changed the radio from a source of entertainment to a source of background music, so most of the fruits of economic growth did not increase the options available to the home economy to either produce the goods or services or purchase them in the market. Growth brought with it increased variety in consumer goods, but not increased flexibility for the home economy in obtaining these goods and services. Instead, economic growth brought with it increased consumer reliance on the marketplace. In order to consume these new goods and services, the family had to enter the marketplace as wage earners and consumers. The neoclassical model that views the family as deciding whether to produce goods and services directly or to purchase them in the marketplace is basically a model of the first stage. It cannot 奥鹏华中师范大学平时在线作业accurately be applied to the second (and current) stage.
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