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Text 3 The word conservation has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such good condition that others may also share the enjoyment. Our forefathers had no idea that human population would increase faster than 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, an 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 work; scientific forestry was anew 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 will 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 be taught the duty of planting trees as well as of cutting them. 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. To avoid the mistakes of our forefathers, the author suggests that______.
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简答题June 20, 2007Dear Mr. Brown,I enclose an illustrated supplement to our catalogue. It covers the latest designs which are now available from stock. We are most gratified that you have, for several years, included a se- lection of our products in your mail-order catalogues. The resulting sales have been very steady. We believe that you will find our new designs most attractive. They should get a very good reception in your market. Once you have had time to study the supplement, please let us know if you would like to take the matter further. We would be very happy to send samples to you for closer inspection. For your information, we are planning a range of classical English dinner services which should do well in the North American market. We will keep you informed on our progress and look forward to hearing from you.Yours faithfully,Tony SmithManager What does the catalogue cover？
Text 2 Punctuation makes the written language intelligible. It does the job, on the page, of the changes of pitch, pace and rhythm which make it possible to understand speech. Unsurprisingly, therefore, a requirement for some knowledge of how to punctuate makes an early appearance in an English curriculum. The trouble is, that necessary though punctuation is, the task of teaching it to children is considerably more challenging than it might appear. For example, it is possible that to instruct children about writing in sentences by telling them about full stops and capital letters is to court frustration and failure. The notion of the sentence as a statement—a free- standing chunk of information—is something that children come to gradually. As written work grows longer and more complicated, so the perception of sentence increases. Good teachers will, in their teaching of early writing, watch for the child’s ability to compose in sentences, and then point out how the use of punctuation will define them more clearly. So, where, in all this, comes the mechanical definition of a sentence—that it needs a verb, for example The pragmatic answer is that it comes nowhere at all. Adult writers do not, on the whole, look back at their sentences to make sure they contain verbs. We all surely feel our sentences intuitively. Most of the time, to be sure, they will contain verbs. Occasionally, though, they may not—and where’s the harm What is certain is that you cannot possibly use the grammatical rule as a tool with which to teach a seven-year-old about sentence-writing. The child can be nudged and helped towards writing in sentences, but on the whole he will not do it until he is ready. The point is that punctuation is an aid which the writer brings into play to illuminate an already formed idea. Before you can learn the punctuation, you have to know what you want to punctuate. Thus you teach capital letters, full stops, question marks and exclamation marks to a child who is already writing sentences, questions and exclamations. The development of a child’s writing will always be a step ahead of the punctuation, and to reverse the process in response, say, to the short-term demands of a curriculum is to put later progress at risk. Which statement can best sum up the main idea of the passage
数据字典是对数据流中数据定义信息的集合，它具有的条目：数据项、数据流、 【11】 和加工。
除“双重出售”以外，新闻产品的商品性还表现出哪些特点
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