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| 《大学英语四级阅读200篇》41-45篇 | ||||||||||||
www.kaoease.com 2007-10-13 考怡网 阅读次 |
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Passage 72 Not all long-distance phone calls are made over phone wires.Today,phone wires are being replaced by fiber optics.Fiber optics make telephoning faster and easier than ever before. In the past,telephone calls were made mostly over copper wires.Copper wires are heavy and bulky.Fiber optics are flexible,glass fibers.They are no thicker than a human hair.A wire cable is as thick as a man's arm.An optical fiber cable is as thick as a thumb. Fiber optics transfer sound into light.First,a person speaks into a phone.The sound is changed into electrical impulses.A small laser changes the electrical impulses into coded bursts of light.The light is decoded hack into electrical impulses at the telephone recieving station.Finally,the electrical impulses are changed into sounds again at the receiving telephone. Optical fibers transimit calls much faster than copper wires can.The laser pulses with light as fast as 90 million times a second.At that speed,every word in a dictionary can be sent through a single fiber in a few seconds.Optical fibers also save space.A few fibers can carry more calls than thousands of strands of copper cable. Optical fibers will be used for video as well as voice communications.And they will prove useful in computer-to-computer hookups.However,it will take years to replace existing wires. 1.Which of the following best expresses the main point of the passage? 2.As it is used in the passage,the phrase"fiber optics"(paragraph1)means _____. 3.Which of the following can not be inferred about fiber cables from the passage? 4.You can infer from the passage that a "cable" is _____. 5.You can infer from the passage that the word"transmit"(paragraph 4) most nearly means _____. In October 1987,the National Board for Professional Teaching Standards began its word to set new standards of accomplichment for the teaching profession and to improve the quality of education available to all children in the United States. Teachers are committed to students and their learning.They must act on the belief that all students can learn.They must recognize individual differences in their students and adjust their practice accordingly.They must know that their mission extends beyond developing the cognitive capcity of their students.They must be concerned with their students' self-concept,with their motivation,and with the development of character. Teacher must know the subjects they teach and how to teach them.They must command sepecialized knowledge of how to convey a subject to sudents.Teachers are responsible for managing and monitoring student learning.They must call on multiple methods to meet their goals,knowing and being able to employ a variety of instructional skills.Teachers must think systematically about their practice and learn from experience,seeking the advice of others and drawing on education research and scholarship to improve their practice. As members of learning communities,teachers contribute to school effectiveness by collaborating with other professionals.They take advantage of community resources,cultivation knowledge of their school's community as a powerful resource for learning. 1."Teachers are committed to students and their learning."The sentence means that _____. 2.According to the author,if a student performs poorly at school,it may be the duty of _____. 3.Teachers' task should go beyond developing the learning ability of students and they should _____. 4.School effectiveness mainly depends on _____. 5.The best title for this passage is _____. 43/200 passage 21 In the early days of nuclear power,the united states made money on it. But today opponents have so complicated its development that no nuclear plants have been ordered or built here in 12 years. The greatest fear of nuclear power opponents has always been a reactor "meltdown". Today, the chances of a meltdown that would threaten U.S.public health are very little.But to even further reduce the possibility,engineers are testing new reactors that rely not on human judgment to shut them down but on the laws of nature.Now General Electric is already building two advanced reactors in Japan.But don't expect them even on U.S.shores unless things change in Washington. The procedure for licensing nuclear power plants is a bad dream.Any time during,or even after,construction,an objection by any group or individual can bring everything to a halt while the matter is investigated or taken to court.Meanwhile,the builder must add nice-but-necesary improvements,some of which force him to knock down walls and start over.In every case when a plant has been opposed,the Nuclear Regulation Commission has ultimately granted a license to construct ends up abandoning the plant anyway. A case in point is the Shoreham plant on New York's Long Island.Shoreham was a virtual twin to the Millstone plant in Connecticet,both ordered in the mid-60s'.Millstone,complete for $101 million,has been generating electricity for two decades.Shoreham, however,was singled out by antinulear activists who,by sending in endless protests,drove the cost $5 billion and delayed its use for many years. Shoreham finally won its operation license.But the plant has never produced a watt power.Governor Mario Cuomo,an opponent of a Shoreham start-up, used his power to force New York's publicutilities commission to accept the following settlement: the power company could pass the cost of Shoreham along to its consumers only if it agreed not to operate the plant.Today,a perfectly good facility,capable of servicing hundreds of thousands of homes,sits rusting. 1.The author's attitude towards the development of nuclear power it _____. 2.What has made the procedure for licensing nuclear power plants a bad dream? 3.It can be inferred from paragraph 2 that ______. 4.Governor Mario Cuomo's chief intention in porposing the settlement was to _______. 43/200答案:cdba 44/200 passage 29 Very old people do raise moral problems for almost everyone who comes in contact with them. Their values-this can't be repeated too often-are not necessarily our values. Physical comfort, cleanness and order not necessarily the most important things. The social services from time to time find themselves faced with a flat with decaying food covered by small worms, and an old person lying alone in bed, taking no notice of the worms. But is it interfering with personal freedom to insist that they go to live with some of their relatives so that they might be taken better care of? Some social workers, the ones who clear up the worms, think we are in danger of carrying this concept of personal freedom to the point where serious risks are being taken with the health and safety of the old. Indeed, the old can be easily hurt or harmed. The body is like a car, it needs more mechanical maintenance as it gets older. You can carry this comparison right through to the provision of spare parts. But never forget that such operations are painful experiences, howerer good the results. And at what point should you cease to treat the old body? Is it morally right to try to push off death by pursuing the development of drugs to excite the forgetful old mind and to activate the old body, knowing that it is designed to die? You cannot ask doctors or scientists to decide, because so long as they can see the technical opportunities, they will feel bound to give them a try, on the principle that while there's life, there's hope. When you talk to the old people, however, you are forced to the conclusion that whether age is happy or unpleasant depends less on money or on health than it does on your ability to have fun. 2.Some social workers think that _______________ . 3.The word "it" in the last paragraph refers to _________ . 4.The author thinks that _____________ . 45/200 It is estimated that some seven hundred million people--about half the world's population--are unable to read and write,and there are probably tow hundred and fifty million more whose level of attainment is so slight that it barely qualifies a literacy. Recently the attack on illiteracy has been stepped up.A world plan has been drawn up by a committee of UNESCO experts in Paris,as part of the UNESCO Nations Development Decade,and an international conference on the subject has also been held.UNESCO stresses that functional literacy is the aim.People must learn the basic skills of responsible citizenship:the ability to read notices,newpapers,timetables,letters,pricelists,to keep simple records and accounts,to sort out the significance of the information gathered,and to fill in forms. The major areas of illiteracy are in Asia,Africa,and Central and South America there are at least one hundred million illiterates,comprising eighty to eighty-five per cent of the total population.In Europe the figure is about twenty-four million,most of them in Southern Europe,with Spain,Italy,Portugal,and Yugoslavia heading the list(the United Kingdom has bout seven hundred thousand). 1.The figure of world illiteracy was obtained by _____. 2.Studying carefully the clues in the passage,we learn that the total population of Africa is _____. 3.The figure of illiteracy in Britain comprises _____. 4.It is obvious that UNESOO _____. 5.A world plan mentioned in the passage aims at _____. 6.The author implies that this world plan is to _____. 45/200 |
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