大学英语四级长篇阅读段落信息匹配题练习

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英语四级长篇阅读段落信息匹配题练习

英语四级长篇阅读段落信息匹配题练习

英语四级长篇阅读段落信息匹配题练习(1)Directions:In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter.长篇阅读:How to Make Attractive and Effective PowerPoint PresentationsA) Microsoft PowerPoint has dramatically changed the way in which academic and business presentations are made. This article outlines few tips on making more effective and attractive PowerPoint presentations.The TextB) Keep the wording clear and simple. Use active, visual language. Cut unnecessary words—a good rule of thumb is to cut paragraphs down to sentences, sentences into phrases, and phrases into key words. Limit the number of words and lines per slide. Try the Rule of Five-five words per line, five lines per slide. If too much text appears on one slide, use the AutoFit feature to split it between two slides. Click within the placeholder to display the AutoFit Options button (its symbol is two horizontal lines with arrows above and below), then click on the button and choose Split Text between Two Slides from the submenu.C) Font size for titles should be at least 36 to 40, while the text body should not be smaller than 24. Use only two font styles per slide—one for the title and the other for the text. Choose two fonts that visually contrast with each other. Garamond Medium Condensed and Impact are good for titles, while Garamond or Tempus Sans can be used for the text body.D) Embed the fonts in your presentation, if you are not sure whether the fonts used in the presentation are present in the computer that will be used for the presentation. To embed the fonts: (1) On the File menu, click Save As. (2) On the toolbar, click Tools, click Save Options, select the Embed TrueType Fonts check box, and then selectEmbed characters in use only.E) Use colors sparingly; two to three at most. You may use one color for all the titles and another for the text body. Be consistent from slide to slide. Choose a font color that contrasts well with the background.F) Capitalizing the first letter of each word is good for the title of slides and suggests a more formal situation than having just the first letter of the first word capitalized. In bullet point lines, capitalize the first word and no other words unless they normally appear capped. Upper and lower case lettering is more readable than all capital letters. Moreover, current styles indicate that using all capital letters means you are shouting. If you have text that is in the wrong case, select the text, and then click Shift+F3 until it changes to the case style that you like. Clicking Shift+F3 toggles the text case between ALL CAPS, lower case, and Initial Capital styles.G) Use bold or italic typeface for emphasis. Avoid underlining, it clutters up the presentation. Don’t center bulleted lists or text. It is confusing t o read. Left align unless you have a good reason not to. Run “spell check” on your show when finished.The BackgroundH) Keep the background consistent. Simple, light textured backgrounds work well. Complicated textures make the content hard to read. If you are planning to use many clips in your slides, select a white background. If the venue of your presentation is not adequately light-proof, select a dark-colored background and use any light color for text. Minimize the use of “bells and whistles”such as sound effects, “flying words” and multiple transitions. Don’t use red in any fonts or backgrounds. It is an emotionally overwhelming color that is difficult to see and read.The ClipsI) Animations are best used subtly; too much flash and motion can distract and annoy viewers. Do not rely too heavily on those images that were originally loaded on your computer with the rest of Office. You can easily find appropriate clips on any topic through Google Images. While searching for images, do not use long search phrases as is usually done while searching the web-use specific words.J) When importing pictures, make sure that they are smaller than two megabytes andare in a .jpg format. Larger files can slow down your show. Keep graphs, charts and diagrams simple, if possible. Use bar graphs and pie charts instead of tables of data. The audience can then immediately pick up the relationships.The PresentationK) If you want your presentation to directly open in the slide show view, save it as a slide show file using the following steps. Open the presentation you want to save as a slide show. On the File menu, click Save As. In the Save as type list, click PowerPoint Show. Your slide show file will be saved with a ppt file extension. When you double-click on this file, it will automatically start your presentation in slide show view. When you’re done, PowerPoint automatically closes and you return to the desktop. If you want to edit the slide show file, you can always open it from PowerPoint by clicking Open on the File menu.L) Look at the audience, not at the slides, whenever possible. If using a laser pointer, don’t move it too fast. For example, if circling a number on the slide, do it slowly. Never point the laser at the audience. Black out the screen (use “B” on the keyboard) after the point has been made, to put the focus on you. Press the key again to continue your presentation.M) You can use the shortcut command [Ctrl]P to access the Pen tool during a slide show. Click with your mouse and drag to use the Pen tool to draw during your slide show. To erase everything you’ve drawn, press the E key. To turn off the Pen t ool, press [Esc] once.MiscellaneousN) Master Slide Set-Up: The “master slide” will allow you to make changes that are reflected on every slide in your presentation. You can change fonts, colors, backgrounds, headers, and footers at the “master slide” le vel. First, go to the “View” menu. Pull down the “Master”menu. Select the “slide master” menu. You may now make changes at this level that meet your presentation needs.练习一对应题目:1. The ways in which academic and business presentations are made have been changed by Microsoft PowerPoint.2. When making the PowerPoint, the wording of the text should not be complicated.3. In each slide, the font styles for the title and the text should contrast with each other.4. A more formal situation is capitalizing the first letter of the first word.5. Centering bulleted lists or text can not help to read.6. Sound effects should be used as less frequently as possible.7. When importing pictures, make sure that they are smaller than two megabytes.8. When making the presentation, you should look at the audience as possible as you can.9. Pressing the E key can help you to erase everything you've drawn.10. In order to meet your presentation needs, you can make changes at the “slide master” level.。

英语四级长篇阅读段落信息匹配题练习3

英语四级长篇阅读段落信息匹配题练习3

英语四级长篇阅读段落信息匹配题练习(3)Section BDirections: In this section, you are going to read a passage with ten statements attach ed to it. Eachstatement contains information given in one of the paragraphs. Identify the p aragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter Answer the questions by marking the corres ponding letter on Answer Sheet 2.TV Linked to Lower MarksA) The effect of television on children has been debated ever since the first sets wer e turned on. Now three new studies find that too much tube time can lower test scores, r etard learning and even predict college performance. The reports appear in the July issue of the Archives of Pediatrics & Ado-lescent Medicine.B) In the first report, researchers studied the effect that having a TV in a child's bed room can have on third graders. "We looked at the household media environment in relati on to academic achievementon mathematics, reading and language arts tests," said stu dy author Dina L.G. Borzekowski, an as-sistant professor at Johns Hopkins Bloomberg Sc hool of Public Health.C) Borzekowski and her colleague, Dr. Thomas Robinson of Stanford University, coll ected data on386 third graders and their parents about how much TV the children watche d, the number of TV sets, computers and video game consoles in the household and wher e they were. They also collected data on how much time the children spent using the diff erent media, as well as the time spent doing homework and reading. The researchers foun d that the media in the household, where it is and how it is used can have a profound e ffect on learning. "We found that the household media environment has a very close asso ciation with performance on the different test scores," Borzekowski said.D) "A child who has a TV in his or her bedroom is likely to have a score that is e ight points lower on a mathematics test compared to a child who doesn't have a TV in t he bedroom," she noted. These children also scored lower on the reading and language art s tests. However, children who have ac-cess to a home computer are likely to have higher scores on each of the tests compared with children who don't have access to a home co mputer, Borzekowski noted.E) The reasons why TV has this negative effect are not clear, Borzekowski said. "W hen there's TV in the bedroom, parents are less likely to have control over the content an d the amount watched," Borzekowski said. "They are also unable to know how early or h ow late the set is on. This seems to be associated with kids' performance on academic tes ts." Borzekowski believes that content and the time the TV is on may be the primary rea sons for its negative effect. "If the TV is in the family room, then parents can see the co ntent of what children are watching," she said. "Parents can choose to sit alongside and w atch, or turn the set off. A simple and straightforward, positive parenting strategy is to ke ep the TV out of the child's bedroom, or remove it if it's already there."F) In the second report, Dr. Robert J. Hancox from the University of Ot ago in Dun edin, New Zealand, and colleagues found, regardless of your intelligence or social backgro und, if you watch a lot of TV during childhood, you are a lot less likely to have a colle ge degree by your mid-20s. In their study, the researchers followed 1,037 people born in 1972 and 1973. Every two years, between the ages of5 and 15, they were asked how mu ch television they watched. The researchers found that those who watched the most televis ion during these years had earned fewer degrees by the time they were 26."We found that the more television the child had watched, the more likely they were to leave school wit hout any qualifications," Hancox said in a prepared statement. "Those who watched little t elevision had the best chance of going on to university and earning a degree."G) Hancox's team found that watching TV at an early age had the most effect on gr aduating from college. "An interesting finding was that although teenage viewing was stro ngly linked to leaving school without any qualifications, it was earlier childhood viewing t hat had the greatest impact on getting a degree," he said. "This suggests that excessive tel evision in younger children has a long-lasting adverse effect on educational performance."H) In the third paper, Frederick J. Zimmerman and Dr. Dimitri A. Christakis from th e University of Washington report that, for very young children, watching TV can result i n lower test scores in mathematics, reading recognition and reading comprehension. "We l ooked at how much television children watched before age 3 and then at ages 3 to 5," Zi mmerman said. "We found that for children who watched a small amount of TV in the e arlier years, there was co nsider able beneficial effect compared to children who watched a lot of TV."I) For children aged 3 to 5, the effect was not as clear, Zimmerman said. "There we re some beneficial effects of watching TV on reading, but no beneficial effects for math or vocabulary," he noted. "The worst pattern was to watch more than three hours of TVbefore age 3. Those kids had a significant disadvantage compared to the other kids." Pare nts should follow the American Academy of Pediatrics recommendation, which is no TV f or children under 2, Zimmerman said. "Personally, I feel the cutoff should be children un der 3, because there is just not any good content for children under 3."J) One expert believes that TV can have both positive and negative effects, but it all depends on what children are watching. "Content matters," said Deborah L. Line barger, an assistant professor at the University of Pennsylvania, who co-authored an accompanying editorial. "Educational content has been found to be related to performance on school rea diness tests, higher grades when they are teen-agers, whereas, non-educational content tend s to be associated with lower academic performance."K) Another expert agrees. "TV watching takes up space that could be used by more useful things," said Dr. Christopher P. Lucas, a clinical coordinator at the Early Childhood Evaluation and Treatment Program at the New York University Child Study Center. "TV is not necessarily toxic, but is some-thing that has to be done in moderation; something that balances the other needs of the child for healthy development."L) Lucas puts the responsibility for how much TV kids watch and what they watch s quarely on parents. "The amount of TV watching certainly has a link with the reduced a mount of time reading or doing homework," he said. "The key is the amount of control p arents have in limiting the amount of access. Get the TV out of the bedroom; be awareof what is being watched; limit the amount of TV watching."46. According to Borzekowski, children having chances to use a family computer are likely to acquire better results on the different tests.47. The reports issued in the Archives of Pediatrics & Adolescents Medicine find that watching too much TV leads to poor performance in school.48. Watching more than three hours of TV before age 3 has bad effect on kids.49. According to the second report, the chance for one to acquire a college degree d epends on the amount of his TV watching during childhood.50. In Deborah L. Lingbarger's opinion, educational content is helpful for teenagers to get better results on school readiness tests.51. The environment of family media greatly affects children's test scores according t o the first report.52. Borzekowski believes that TV's negative effect on children's marks may mainly lie in what children watch on TV and how much time they spend on it.53. Lucas thinks parents should take the responsibility to supervise kids' TV watching.54. According to the recommendation from American Academy of Pediatrics, children under 2 should watch no TV.55. Hancox thinks earlier childhood TV watching affects one's acquiring a college de gree most.SectionB电视机与成绩差有关A.)自电视机问世以来,其对孩子的影响便一直颇具争议。

英语四级长篇阅读段落信息匹配题练习及答案-4

英语四级长篇阅读段落信息匹配题练习及答案-4

Directions: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter.长篇阅读Definitions of ObesityA) How does one define when a person is considered to be obese and not just somewhat overweight? Height-weight tables give an approximate guideline as to whether one is simply overweight or has passed into the obese stage.B) The World Health Organization recommends using a formula that takes into account a person's height and weight. The "Body Mass Index" (BMI) is calculated by dividing the person's weight in kilograms by the square of their height in meters, and is thus given in units of kg/m2. A BMI of 18.5-24.9 is considered to be the healthiest. A BMI of between 25 and 29.9 is considered to be overweight, while a BMI of over 30 is considered to be obese.C) However, it is recognized that this definition is limited as it does not take into account such variables as age, gender and ethnic origin, the latter being important as different ethnic groups have very different fat distributions. Another shortcoming is that it is not applicable to certain very muscular people such as athletes and bodybuilders, who can also have artificially high BMIs. Agencies such as the National Cholesterol Education Program (NCEP) in the USA and the International Diabetes Foundation (IDF) are starting to define obesity in adults simply in terms of waist circumference.Health Effects of ObesityD) Over 2000 years ago, the Greek physician Hippocrates wrote that "persons who are naturally very fat are apt to die earlier than those who are slender". This observation remains very true today. Obesity has a major impact on a person's physical, social and emotional well-being. It increases the risk of developing diabetes mellitus type 2 ("mature onset diabetes") and also makes Type 2 diabetes more difficult to control. Thus weight loss improves the levels of blood glucose and blood fats, and reduces blood pressure. The association between obesity and coronary heart disease is also well-known.CancerE) Furthermore, in 2001 medical researchers established a link between being overweight and certain forms of cancer, and estimated that nearly 10,000 Britons per year develop cancer as a result of being overweight. This figure was made up of 5,893 women and 3,220 men, with the strongest associations being with breast and colon cancers. However, it is thought that being overweight may also increase the risk of cancer in the reproductive organs for women and in the prostate gland for men.F) The link between breast cancer and nutritional status is thought to be due to the steroid hormones oestrogen and progesterone, which are produced by the ovaries, and govern a woman's menstrual cycle. Researchers have found that the more a woman eats, or the more sedentary her lifestyle, the higher are the concentrations of progesterone. This link could explain why women from less affluent countries have lower rates of breast cancer. Women from less affluent nations tend to eat less food and to lead lifestyles which involve more daily movement. This lowers their progesterone level, resulting inlower predisposition to breast cancer.G) The Times newspaper, in 2002 reported that obesity was the main avoidable cause of cancer among non-smokers in the Western world!AgingH) Research published by St Thomas' Hospital, London, UK in 2005 showed a correlation between body fat and aging, to the extent that being obese added 8.8 years to a woman's biological age. The effect was exacerbated by smoking, and a non-overweight woman who smokes 20 cigarettes a day for 20 years added 7.4 years to their biological age. The combination of being obese and asmoker added at least ten years to a woman’s biological age, and although the study only involved women, the lead researcher Professor Tim Spector believes the finding would also apply to men.I) The aging effect was determined by measuring the length of telomeres, tiny "caps" on the ends of chromosomes, which help protect the DNA from the ageing process. Indeed, telomeres have been dubbed the "chromosomal clock" because, as an organism ages, they become progressively shorter, and can be used to determine the age of the organism. Beyond a certain point, the telomere becomes so short that it is no longer able to prevent the DNA of the chromosome from falling apart. It is believed that excess body fat, and the chemicals present in tobacco smoke release free radicals which trigger inflammation. Inflammation causes the production of white blood cells which increases the rate of erosion of telomeres.DementiaJ) Recent research (2005) conducted in the USA shows that obesity in middle age is linked to an increased risk of dementia, with obese people in their 40s being 74% more likely to develop dementia compared to those of normal weight. For those who are merely overweight, the lifetime risk of dementia risk was 35% higher.K) Scientists from the Aging Research Centre at the Karolinska Institute in Sweden have been able to take information such as age, number of years in education, gender, body mass index, blood pressure level, physical activity and genetic factors, assigning each a risk score. They then used this information to devise a predictive test for dementia. This test will enable people at risk, for the first time, to be able to affect lifestyle changes which will reduce their risk of contracting dementia.Other ProblemsL) The world-wide upsurge in obesity, particularly in children, is of major economic concern, liable to drain economies. Of further concern is that research conducted in Australia and published in 2006, shows that up to one third of breech pregnancies were undetected by the traditional "palpation" examination, the danger being greatest for those women who are overweight or obese—a growing proportion of mothers. This means that such women are not getting thetreatment required to turn the baby around in time for the birth, and in many cases require an emergency Caesarean section.M) This is a true health-care crisis, far bigger than Severe Acute Respiratory Syndrome (SARS) and ultimately, even bigger than AIDS.对应题目:1. You can judge whether one is simply overweight or has passed into the obese stage according to the height-weight table.2. Using the "Body Mass Index" to define a person's weight ideal is limited, because it does not takes into account many variables such as age, gender and ethnic origin.3. A person's emotional well-being would be affected by obesity.4. Obesity has something to do with cancer in the prostate gland for man.5. Women from less affluent nations tend to have much less breast cancer.6. A non-overweight woman who smokes 20 cigarettes a day for 20 years added7.4 years to her biological age.7. The excess body fat, like the chemicals present in tobacco smoke, can lead to inflammation.8. Obese people in middle age run an increased risk of dementia .9. The predictive test for dementia will help people to affect lifestyle changes that will reduce their risk of contracting dementia.10. The world-wide upsurge in obesity, particularly in children, will possibly drain economies.参考答案:1. A2. C3. D4. E5. F6. H7. I8. J9. K10. L。

英语四级长篇阅读段落信息匹配题练习附答案和解析(1)

英语四级长篇阅读段落信息匹配题练习附答案和解析(1)

英语四级长篇阅读段落信息匹配题练习附答案和解析(1)Section BDirections:In this section,you are going to read a passage with ten statements attached to it.Each statement contains information given in one of the paragraphs.Identify the paragraph from which the information is derived.You may choose a paragraph more than once.Each paragraph is marked with a letter Answer the questions by marking the corresponding letter on Answer Sheet 2.Driver’s License Test TipsA.This article will provide you with some simple tips for passing your driver’s license test.Adequate preparation is absolutely essential,without which any number of driver’s license test tips will be redundant.B.Getting a driver’s license is a big step in anyone’s life.It gives an individual the luxury to drive a car anytime he or she pleases,as driving without passing a driver’s license test is against the law.For some people,the stress can be too much to handle and as a result they may mess up on the driver’s license test.Thereare some simple driver’s license test tips that anyone can follow,to be assured of passing the test and getting their driver’s license.C.The most important of all the tips for passing your driver’s license test is to be prepared.This can only be achieved by you through hours and hours of sincere and diligent practice.If you are not sufficiently prepared for your driver’s license test,all the driver’s license tips for passing your driver’slicense test will be utterly pointless and redundant.You can read as many drivers’license test tips as you want,but if you are not practicing enough,then all these driving test tips will be in vain.Enroll ing yourself in driving schools is advisable for this purpose.D.Now,if you’re wondering how to prepare for your driving test,the first thing you need to know is what the driving test instructors and officials are going to be looking for.The following are the qualities that the instructors will be on the lookout for and also the parameters that the scoring will be conducted on.E)Starting the vehicle:The instructor will be observing you right from the time you start the vehicle.He will note if you tum your head to look back and if youfollow all the safety regulations that are required to be followed while starting a vehicle.Here are some tips on learning to drive a car.F)Control of the vehicle:He will pay close attention to how much control you actually have over the vehicle.Your abilities with the gas pedal,the brake,the steering wheel and other controls will be scrutinized.G)Steering:Not many road test tips stress on the importance of steering.This quality is closely analyzed by the instructor and obviously if your steering is wayward(任性的),the chances of passing the driver’s license test are very slim.H)Driving in traffic:Keeping calm and avoiding panic attacks while driving in traffic is of utmost importance.Many people get extremely stressed and nervous,when they are in the midst of traffic and one of the very crucial tips to pass road test for driver’s license is to stay calm and composed when driving in traffic.Also read more on road safety and car safety.I)Traffic signs and lane discipline:This is another area that the instructors will be rating you on.Your ability to observe lane discipline and your recognition of the various traffic signs plays a major role in your passing the test.Keep these driver’s license test tips in mind to pass the test inyour veryfirst attempt.J)Stopping:Stopping the car smoothly and at the right place is a critical skill to have.When the in. structor asks you to stop the car,the timing,the positioning and the technique of doing so are important driving test tips to bear in mind.K)Backing up and distance judgment:Your backing up skills and your ability to judge the distances between your vehicle and other entities will also be carefully scrutinized.If you cannot back up your vehicle satisfactorily ,parking would be very troublesome for you and a major source of hazard to you and to others around you.L)Hill parking:One of the essential tips for passing your driver’s license test is to master the art of hill parking.This is not as easy as it seems and can become a major source of anxiety in a driver.If you can display good skills at hill parking,it proves that you have developed good control over the vehicle.M)Arm signals and driving etiquette:Another aspect that you will be judged on is your efficiency at giving the right arm signals at the right time.Your respect for other drivers on the road and the amount of courtesy you show them also plays a part in your final rating on the driver’s license test.Read more about defensive driving techniques and tips and defensive driving courses.N)Drivers who are well aware and informed about all the rules and regulations that need to be followed have a beRer chance of clearing their driver’s license test.The primary goal of these driver,slicense test tips is to instill(慢慢灌输)a responsible and mature frame of mind in every individual.These road test tips will be pointless unless you develop a calm demeanor and tmless you are aware of all the rules that must be followed while driving.O)Here are a few more basic drivers’license test tips that you should keep in mind when vou,re leaming how to prepare for your driving test.Always use the restroom before your test begins.Not doing so will cause more anxiety during the test.Memorize all the traffic signs and their significance well in advance before the e your rear view mirrors efficiently and regularly.Ensure that you are well on time for your test and are carrying all the required documents and paperwork.Get adequate sleep the previous night and do not give the test with an empty stomach.Stick to the permitted speed limit.Do not drive too fast and do not drive too slow either.P)Passing a driver’s license test is not simple and unlessyou are well versed in driver education.You could face a lot of difficulties.At the end of the day,remember that the instructors also want you to pass the test,so do your best to stay calm and composed and believe in your ability to pass the test.This cannot be reinstated enough,but the key to passing your driver’s license test is practice.46.According to this article,the importance of steering is emphasized by not many road test tips.47.Your timing,positioning and technique should be considered by yourself when you stoD your test car.48.Some people may fail their driver’s license tests because they have too much stress.49.Hill parking as one of the essential tips for your license test seems easV.50.The tips in this article primarily aimed at instillinga responsible and mature frame of mind in you.51.In order to pass your driver’s license test.you should practice.52.Your driver’s license test begins in practice when you start your test car.53.During the preparation process,a few more basic tipsshould be kept in mind.54.You should sleep adequately the night before your test.55.A lot of difficulties could be faced if you are not well versed in driver education.答案解析Section B驾照考试技巧48.Some people may fail their driver’S license tests because they have too much stress.有些人可能没有通过驾照考试,是因为压力太大。

英语四级长篇阅读段落信息匹配题练习及答案解析(11)

英语四级长篇阅读段落信息匹配题练习及答案解析(11)

英语四级长篇阅读段落信息匹配题练习及答案解析(11)Jaguars Don't Live Here AnymoreA)Earlier this month, the United States Fish and Wildlife Service announced it would appoint" critical habitat" for the endangered jaguar. Jaguars--the world's third-largest wild cats, weighing up to 250 pounds, with distinctive black rosettes ( 玫瑰花色) on their fur--are a separate species from the smaller, tawny (黄褐色的) mountain lions, which still roam large areas of the American West in the United States and take the first steps toward mandating (批准) a jaguar recovery plan. This is a policy reversal and, on the surface, it may appear to be a victory for the conservation community and for jaguars, the largest wild cats in the Western Hemisphere.B) But as someone who has studied jaguars for nearly three decades, I can tell you it is nothing less than a slap in the face to good science. What's more, by changing the rules for animal preservation, it stands to weaken the Endangered Species Act.C)The debate on what to do about jaguars started in 1997, when, at the urging of many biologists ( including me), the Fish and Wildlife Service put the jaguar on the United States endangered species list, because there had been occasional sightings of the cats crossing north over the United States-Mexico border. At the same time, however, the agency ruled that it would not be "prudent" (谨慎的) to declare that the jaguar has critical .habitat--a geographic area containing features the species needs to survive--in the United States. Determining an endangered species' critical habitat is a first step toward developing a plan for helping that species recover.D)The 1997 decision not to determine critical habitat for the jaguar was the right one, because even though they cross the border from time to time, jaguars don't occupy any territory in our country--and that probably means the environment here is no longer ideal for them.E)In prehistoric times, these beautiful cats inhabited significant areas of the western United States, but in the past 100 years, there have been few, if any, resident breeding populations here. The last time a female jaguar with a cub ( 幼兽) was sighted in this country was in the early 1900s.F)Two well-intentioned conservation advocacy groups, the Center for Biological Diversity and Defenders of Wildlife, sued the Fish and Wildlife Service to change its ruling. Thus in 2006, the agency reassessed the situation and again determined that no areas in the United States met the definition of critical habitat for the jaguar. Despite occasional sightings, mostly within 40 miles of the Mexican border, there were still no data to indicate jaguars had taken up residence inside the United States.G ) After this second ruling was made, an Arizona rancher ( 牧场主), with support from the state Game and Fish Department, set infrared-camera (红外摄像机) traps togather more data, and essentially confirmed the Fish and Wildlife Service's findings. The cameras did capture transient jaguars, including one male jaguar, nick named Macho, B, who roamed the Arizona borderlands for more than a decade. But Macho B, now dead, might have been the sole resident American jaguar, and his extensive travels indicated he was not having an easy time surviving in this dry, rugged region.H) Despite the continued evidence, the two conservation advocacy groups continued to sue the government. Apparently, they want jaguars to repopulate the United State seven if jaguars don't wan! to. Last March, a federal district judge in Arizona ordered the Fish and Wildlife Service to revisit its 2006 determination on critical habitat.I)The facts haven't changed: there is still no area in the United States essential to the conservation of the jaguar. But, having asserted this twice already, the service, nowunder a new president, has bent to the tiresome litigation (诉讼). On Jan. 12, Fish and Wildlife officials, claimed to have evaluated new scientific information that had become available after the July 2006 ruling. They determined that it is now prudent to appoint critical habitat for the jaguar in the United States.J)This means that Fish and Wildlife must now also formulate a recovery plan for the jaguar. And since jaguars have not been able to reestablish themselves naturally over the past century, the government will likely have to go to significant expense to attempt to bring them back--especially if the cats have to be reintroduced.K)So why not do everything we can, at whatever cost, to bring jaguars back into the United States? To begin with, the American Southwest is, at best, marginal habitat for the animals. More important, there are better ways to help jaguars. South of our border, from Mexico to Argentina, thousands of jaguars live and breed in their true critical habitat. Governments and conservation groups (including the one I head) are already working hard to conserve jaguar populations and connect them to one another through an initiative called the Jaguar Corridor.L).The jaguars that now and then cross into the United States most likely come from the northernmost population of jaguars, in Sonora, Mexico. Rather than demand jaguars return to our country, we should help Mexico and other jaguar-range countries conserve the animals' true habitat itM )The recent move by the Fish and Wildlife Service means that the rare federal funds devoted to protecting wild animals will be wasted on efforts that cannot help save jaguars. It also stands to weaken the Endangered Species Act, because if critical habitat is redefined as any place where a species might ever have existed, and where you or I might want it to exist again, then the door is open for many other sense less efforts to bring back long-lost creatures.N)The Fish and Wildlife officials whose job is to protect the country's wild animals need to grow a stronger backbone--stick with their original, correct decision and save their money for more useful preservation work. Otherwise, when funds are needed to preserve all those small, ugly, non-charismatic endangered species at the back of the line, there may be no money left.1. It is still a fact that there is no suitable place for jaguars to live safely in the United States.2. The United States Fish and Wildlife Service should be more determined and saving for the conservation work.3. Jaguars were regarded as endangered species because of their rare appearance at the United States-Mexico border.4. Money was not spent effectively in helping save jaguars in the recent move by the Fish and Wildlife Service.5. It can be inferred that the United States is not the best choice for jaguars to live from the evidence that they don't settle anywhere here.6. South of the United States' border, from Mexico to Argentina, is the true critical habitat for jaguars.7. The number of jaguars breeding populations in significant areas of the western United States has deceased in the past century.8. It is necessary for the government to invest lots of funds in order to help jaguars to reestablish.9. It didn't indicate that jaguars had settled down in the United States even though they were seen within 40 miles of the Mexican border at times.10. Fish and Wildlife officials were sure enough to appoint critical habitat for the jaguar in the United States.1.I)。

英语四级长篇阅读段落信息匹配题练习7

英语四级长篇阅读段落信息匹配题练习7

英语四级长篇阅读段落信息匹配题练习(7)Section BDirections:In this section,you are going to read a passage with ten statements attac hed to it.Each statement contains information given in one of the paragraphs.Identify th e paragraph from which the information is derived.You may choose a paragraph more th an once.Each paragraph is marked with a letter.Answer the questions by marking the c orresponding letter on Answer Sheet 2.Promote Learning and Skills for Young People and AdultsA) This goal places the emphasis on the learning needs of young people and adults i n the context of lifelong learning.It calls for fair access to learning programs that are ap propriate,and mentions life skills particularly.B)Education is about giving people the opportunity to develop their potential,their pe rsonality and their strengths.This does not merely mean learning new knowledge,but als o developing abilities to make the most of life.These are called life skills——including t he inner capacities and the practical skills we need.C)Many of the inner capacities——often known as psych0—social skills——cannot be taught as subjects.They are not the same as academic or technical learnin9.They must rather be modeled and promoted as part of learning,and in particular by teachers.These skills have to do with the way we behave—towards other people,towards ourselves,towa rds the challenges and problems of life.They include skills in communicating,in making decisions and solving problems,in negotiating and expressing ourselves,in thinking critically and understanding our feelings.D)More practical life skills are the kinds of manual skills we need for the physical t asks we face.Some would include vocational skills under the heading of life skills——the ability to lay bricks.sew clothes,catch fish or repair a motorbike.These are skills by which people may earn their livelihood and which are often available to young people lea ving school.In fact,very often young people learn psycho-social skills as they learn mor e practical skills.Learning vocational skills can be a strategy for acquiring both practical and psycho-social skills.E)We need to increase our life skills at every stage of life,so learning them may be part of early child—hood education.of primary and secondary education and of adult learning groups.Life skills can be put into the categories that the Jacques Delors report sugg ested;it spoke of four pillars of education,which correspond to certain kinds of life skill s—Learning to know:Thinking abilities:such as problem—solving,critical thinking,dec ision making,understanding consequences.Learning to be:Personal abilities:such as ma naging stress and feelings,self-awareness,self-confidence.Learning to live together:Soci al abilities:such as communication,negotiation,teamwork.Learning to do:Manual skil ls:practicing know-how required for work and tasks.F)In today’s world all these skills are necessary, in order to face rapid change in soc iety.This means that it is important to know how to go on learning as we require new s kills for life and work.In addition,we need to know how to cope with the flood of inf ormation and turn it in to useful knowledge.We also need to learn how to handle change in society and in our own lives.G)Life skills are both concrete and abstract—practical skills can be learned directly, a s a subject.For example, a learner can take a course in laying bricks and learn that skil l.Other life skills,such as self-confidence,self-esteem,and skills for relating to others or thinking critically cannot be taught in such direct ways.They should be part of any le arning process,where teachers or instructors are concerned that learners should not just le arn about subjects,but learn how to cope with life and make the most of their potential.H)So these life skills may be learnt when learning other things.For example:Learni ng literacy may have a big impact on self-esteem,on critical thinking or on communicati on skills;Learning practical skills s ach as drivin9,healthcare or tailoring may increase s elf-confidence,teach problem—solving processes or help in understanding consequences.I) Whether this is true depends on the way of teachin9—what kinds of thinkin9,relat ionship building and communication the teacher or facilitator models themselves and prom otes among the learners.It would require measuring the individual and collective progress in making the most of learning and of life,or assessing how far human potential is being realized,or estimat ing how well people cope with change.It is easier to measure the development of practic al skills,for instance by counting the number of students who register for vocational skill s courses.However, this still may not tell us how effectively these skills are being used.J)The psych0.social skills cannot easily be measured by tests and scores,but become visible in Chang behavior.Progress in this area has often been noted by teachers on re ports which they make to the parents of their pupils.The teacher’s experience of life,of teaching and of what can be expected from education in the broadest sense serve as a standard by which the growth and development of individuals can be assessed to some exten t.This kind of assessment is individual and may never appear in international tables and charts.K)The current challenges relate to these difficulties:We need to recognize the import ance of life skills both practical and psycho-social as part of education which leads to t he full development of human potential and to the development of society.The links bet ween psycho—social skills and practical skills must be more clearly spelled out,so that e ducators can promote both together and find effective ways to do this.Since life skills ar e taught as part of a wide range of subjects,teachers need to have training in how to pu t them across and how to monit or learners’growth in these areas.In designing curricula and syllabuses for academic subjects,there must be a balance between content teaching and attention to the accompanying life skills.A more conscious and deliberate effort to promote life skills will enable learners to become more active citiz ens in the life of society.L) Governments should recognize and actively advocate for the transformational role of education in realizing human potential and in socio—economic development.Ensure tha t curricula and syllabuses address life skills and give learners the opportunity to make real -life applications of knowledge,skills and attitudes.Show how life skills of all kinds app ly in the world of work,for example,negotiating and communication skills,as well prac tical skills.Through initial and in-service teacher training,increase the use of active and participatory learning/teaching approaches.Examine and adapt the processes and content of education so that there is a balance between academic input and life skills developmen t.Make sure that education inspectors look not only for academic progress through teachi ng and learning,but also progress in the communication,modeling and application of li fe skills.Advocate for the links between primary and(early)secondary education because le arning life skills needs eight or nine years and recognize that the prospect of effective sec ondary education is an incentive to children,and their parents,to complete primary educ ation successfully.M)Funding agencies should support research,exchange and debate.nationally and reg ionally,on ways of strengthening life skills education.Support innovative(创新的)teacher training in order to combine life skills promotion into subjects across the curriculum and as a fundamental part of what school and education are about.Recognize the links betwee n primary and secondary education in ensuring that children develop strong life skills.Sup port,therefore,the early years of secondary education as part basic education.N) As support to governments and in cooperation with other international agencies,U NESC0:Works to define life skills better and clarify what it means to teach and learn th em.Assists education. policy makers and teachers to develop and use a life skills approac h to education.Advocates for the links between a life skills approach to education and br oader society and human development.46.The recognition of life skills as part of education will promote the development o f human potential and society.47.The abilities to make the most of life consist of the inner capacities and the prac tical skills.48.The progress in psycho—social skills can be measured by changed behavior.49.Governments should examine and adapt the processes and content of education so as to balance the academic input and life skills development.50.According to Jacques Delors,four pillars of education include learning to know, learning to be,learning to live together and learning to do.51.The funding agencies should link primary education and secondary education to make sure that children develop strong life skills.52.Learning literacy may exert an influence on self-esteem,critical thinking and co mmunication skills.53.One function of UNESCO is to help educational policy makers and teachers to d evelop and use a life skills approach to education.54.Learning vocational skills can be an approach to acquiring both practical and psy cho—social skills.55.The abilities to manage stress and feelings,self-awareness,self-confidence are pe rsonal abilitiesSection B促进年轻人和成年人的学习和技能A)这个目标以“终生学习”为背景,将重点放在年轻人和成年人的学习需要上。

英语四级长篇阅读匹配试题及答案

英语四级长篇阅读匹配试题及答案

英语四级长篇阅读匹配试题及答案英语四级长篇阅读匹配试题及答案 1There are three kinds of goals: short-term,medium-range and long-term goals. Short-range goals are those that usually deal with current activities,which we can apply on a daily basis.Such goals can be achieved in a week or less,or two weeks,or possible months.It should be remembered that just as a building is no stronger than its foundation ,out long-term goals cannot amount to very munch without the achievement of solid short-term goals.Upon completing our short-term goals,we should date the occasion and then add new short-term goals that will build on those that have been completed. The intermediate goals bukld on the foundation of the short-range goals.They might deal with just one term of school or the entire school year,or they could even extend for several years.Any time you move a step at a time,you should never allow yourself to become discouraged or overwhelmed. As you complete each step,you will enforce the belief in your ability to grow adn succeed.And as your list of completion dates grow,your motivation and desire will increase.Long-range goals may be related to our dreams of the future. They might cover five years or more. Life is not a static thing.We should never allow a long-term goal to limit us or our course of action. 1.Our long-term goals mean a lot______.A.if we complete our short-range goalsB.if we cannot reach solid short-term goalsC.if we write down the datesD.if we put forward some plans2.New short-term goals are bulid upon______.A.two yearsB.long-term goalsC.current activitiesD.the goals that have been completed3.When we complete each step of our goals ,______.A.we will win final successB.we are overwhelmedC.we should build up confidence of successD.we should strong desire for setting new goals 4.Once our goals are drawn up,_______.A.we should stick to them until we complete themB.we may change our goals as we have new ideas and opportunitiesC.we had better wait for the exciting news of successD.we have made great decision5.It is implied but not stated in the passage that ______.A.those who habe long-term goals will succeedB.writing down the dates may discourage youC.the goal is only a guide for us to reach our desinationD.every should have a goal答案:adcbc英语四级长篇阅读匹配试题及答案 2If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet.By the middle of the 21st century,if present trends continue, we will have used up all the oil that drives our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on earth will make it necessary for lus to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however,has recently been suggested by American scientist, Professor Carl Sagan. Sagan believes that before the earths resources are compleetely exhausted it will be possible to change the atmophere of Venus and so create a new world almost as large as earth itself. The difficult is that Venus is much hotter than the earth and there is only a tiny amount of water there. Sagan proposes that algae organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen,should be bred in condition similar to those on Venus.As soon as this has been done, the algae will be placed in small rockets. Spaceship will then fly to Venus and fire the rockets into the atmosphere .In a fairly short time, the alge will break down the carbon dioxide into oxygen andcarbon. When the algae have done theri work, the atmosphere will become cooler,but befor man can set foot on Venus it will be neccessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus. -1.Inte long run, the most insoluble problem caused by population growth on earth will probably be the lack of ______.a.foodb.oilc.spaced.resources2.Carl Sagan believes that Venus might be colonized from earth because _____ a.it might be possible to change its atmosphere b.its atmosphere is the same as the earthsc.there is a good supply of water on Venusd.the days on Venus are long enough3.On Venus there is a lot of ________.a.waterb.carbon dioxidec.carbon monoxided.oxygen4.Algae are plants that can____.a.live in very hot temperaturesb.live in very cold temperaturesc.manufacture oxygend.all of the above5. Man can land on Venus only when_______. a.the algae have done their work -b.the atmosphere becomes coolerc.thereis oxygend.it rains there答案:cabdd英语四级长篇阅读匹配试题及答案 3Like a needle climbing up a bathroom scale, the number keeps rising. In 1991, 15% of Americans were obese(肥胖的); by 1999, that proportion had grown to 27%. Youngsters, who should have age and activity on their side, are growing larger as well: 19% of Americans under 17 are obese. Waistbands have been popping in other western countries too, as physical activity has declined and diets have expanded. By and large, people in the rich world seem to have lost the fight against flab(松弛).Meanwhile, poorer nations have enjoyed some success in their battles against malnutrition and famine. But, according to research presented at the annual meeting of the American Association for the Advancement of Science, it is more a case of being out of the frying pan and into the fire. The most striking example actually in the poor world comes from the Pacific islands, home of the world’s most obese communities. In 1966, 14% of the men on this island were obese while 100% of men under the age of 30 in 1996 were obese.This increase in weight has been uneven as well as fast. As a result, undernourished and over-nourished people frequently live cheek by jowl(面颊). The mix can even occur within a single household. A study of families in Indonesia found that nearly 10% contained both the hungry and the fat. This is a mysterious phenomenon, but might have something to do with people of different ages being given different amounts of food to eat.The prospect of heading off these problems is bleak. In many affected countries there are cultural factorsto contend with, such as an emphasis on eating large meals together, or on food as a form. ofhospitality.Moreover, there is a good measure of disbelief on the part of policymakers that such a problem Could existin their countries. Add to that reluctance on the part of governments to spend resources on promoting dietand exercise while starvation is still a real threat, and the result is a recipe for inaction. Unless something is done soon, it might not be possible to turn the clock back.英语四级阅读模拟试题:Choose correct answers to the question:1.The first sentence of the passage most probably implies that ______.A.many Americans are obsessed with the rising temperature in their bathroomB.more people are overweighed in the United StatesC.people are doing more physical exercises with the help of scalesD.youngsters become taller and healthier thanks to more activities2.As physical exercise declines and diet expands, ______.A.other western countries has been defeated by fatB.obesity has become an epidemic(流行病)of the rich worldC.waistbands begin to be popular in other western countriesD.western countries can no longer fight against obesity3.Which is NOT the point of the example of the Pacific Islands?A.The poor community has shaken off poverty and people are well-fed now.B.Obesity is becoming a problem in the developing world too.C.Excessive weight increase will cause no less harm than the food shortage.D.The problem of overweight emerges very fast.4.Of tackling obesity in the poor world, we can learn from the passage that____A.the matter is so complex as to go beyond our capacityB.no matter what we do, the prospect will always be bleakC.it is starvation, the real threat, that needs to be solvedD.we should take immediate actions before it becomes incurable5.What is the main idea of this passage?A.Obesity is now a global problem that needs tackling.B.The weights increase fast throughout the whole world.C.Obesity and starvation are two main problems in the poor world.D.Obesity has shifted from the rich world to the poor world.英语四级阅读参考答案1.[B] 推理判断题。

英语四级长篇阅读段落信息匹配题练习7

英语四级长篇阅读段落信息匹配题练习7

英语四级长篇阅读段落信息匹配题练习(7)Section BDirections:In this section,you are going to read a passage with ten statements attac hed to it.Each statement contains information given in one of the paragraphs.Identify th e paragraph from which the information is derived.You may choose a paragraph more th an once.Each paragraph is marked with a letter.Answer the questions by marking the c orresponding letter on Answer Sheet 2.Promote Learning and Skills for Young People and AdultsA) This goal places the emphasis on the learning needs of young people and adults i n the context of lifelong learning.It calls for fair access to learning programs that are ap propriate,and mentions life skills particularly.B)Education is about giving people the opportunity to develop their potential,their pe rsonality and their strengths.This does not merely mean learning new knowledge,but als o developing abilities to make the most of life.These are called life skills——including t he inner capacities and the practical skills we need.C)Many of the inner capacities——often known as psych0—social skills——cannot be taught as subjects.They are not the same as academic or technical learnin9.They must rather be modeled and promoted as part of learning,and in particular by teachers.These skills have to do with the way we behave—towards other people,towards ourselves,towa rds the challenges and problems of life.They include skills in communicating,in making decisions and solving problems,in negotiating and expressing ourselves,in thinking critically and understanding our feelings.D)More practical life skills are the kinds of manual skills we need for the physical t asks we face.Some would include vocational skills under the heading of life skills——the ability to lay bricks.sew clothes,catch fish or repair a motorbike.These are skills by which people may earn their livelihood and which are often available to young people lea ving school.In fact,very often young people learn psycho-social skills as they learn mor e practical skills.Learning vocational skills can be a strategy for acquiring both practical and psycho-social skills.E)We need to increase our life skills at every stage of life,so learning them may be part of early child—hood education.of primary and secondary education and of adult learning groups.Life skills can be put into the categories that the Jacques Delors report sugg ested;it spoke of four pillars of education,which correspond to certain kinds of life skill s—Learning to know:Thinking abilities:such as problem—solving,critical thinking,dec ision making,understanding consequences.Learning to be:Personal abilities:such as ma naging stress and feelings,self-awareness,self-confidence.Learning to live together:Soci al abilities:such as communication,negotiation,teamwork.Learning to do:Manual skil ls:practicing know-how required for work and tasks.F)In today’s world all these skills are necessary, in order to face rapid change in soc iety.This means that it is important to know how to go on learning as we require new s kills for life and work.In addition,we need to know how to cope with the flood of inf ormation and turn it in to useful knowledge.We also need to learn how to handle change in society and in our own lives.G)Life skills are both concrete and abstract—practical skills can be learned directly, a s a subject.For example, a learner can take a course in laying bricks and learn that skil l.Other life skills,such as self-confidence,self-esteem,and skills for relating to others or thinking critically cannot be taught in such direct ways.They should be part of any le arning process,where teachers or instructors are concerned that learners should not just le arn about subjects,but learn how to cope with life and make the most of their potential.H)So these life skills may be learnt when learning other things.For example:Learni ng literacy may have a big impact on self-esteem,on critical thinking or on communicati on skills;Learning practical skills s ach as drivin9,healthcare or tailoring may increase s elf-confidence,teach problem—solving processes or help in understanding consequences.I) Whether this is true depends on the way of teachin9—what kinds of thinkin9,relat ionship building and communication the teacher or facilitator models themselves and prom otes among the learners.It would require measuring the individual and collective progress in making the most of learning and of life,or assessing how far human potential is being realized,or estimat ing how well people cope with change.It is easier to measure the development of practic al skills,for instance by counting the number of students who register for vocational skill s courses.However, this still may not tell us how effectively these skills are being used.J)The psych0.social skills cannot easily be measured by tests and scores,but become visible in Chang behavior.Progress in this area has often been noted by teachers on re ports which they make to the parents of their pupils.The teacher’s experience of life,of teaching and of what can be expected from education in the broadest sense serve as a standard by which the growth and development of individuals can be assessed to some exten t.This kind of assessment is individual and may never appear in international tables and charts.K)The current challenges relate to these difficulties:We need to recognize the import ance of life skills both practical and psycho-social as part of education which leads to t he full development of human potential and to the development of society.The links bet ween psycho—social skills and practical skills must be more clearly spelled out,so that e ducators can promote both together and find effective ways to do this.Since life skills ar e taught as part of a wide range of subjects,teachers need to have training in how to pu t them across and how to monit or learners’growth in these areas.In designing curricula and syllabuses for academic subjects,there must be a balance between content teaching and attention to the accompanying life skills.A more conscious and deliberate effort to promote life skills will enable learners to become more active citiz ens in the life of society.L) Governments should recognize and actively advocate for the transformational role of education in realizing human potential and in socio—economic development.Ensure tha t curricula and syllabuses address life skills and give learners the opportunity to make real -life applications of knowledge,skills and attitudes.Show how life skills of all kinds app ly in the world of work,for example,negotiating and communication skills,as well prac tical skills.Through initial and in-service teacher training,increase the use of active and participatory learning/teaching approaches.Examine and adapt the processes and content of education so that there is a balance between academic input and life skills developmen t.Make sure that education inspectors look not only for academic progress through teachi ng and learning,but also progress in the communication,modeling and application of li fe skills.Advocate for the links between primary and(early)secondary education because le arning life skills needs eight or nine years and recognize that the prospect of effective sec ondary education is an incentive to children,and their parents,to complete primary educ ation successfully.M)Funding agencies should support research,exchange and debate.nationally and reg ionally,on ways of strengthening life skills education.Support innovative(创新的)teacher training in order to combine life skills promotion into subjects across the curriculum and as a fundamental part of what school and education are about.Recognize the links betwee n primary and secondary education in ensuring that children develop strong life skills.Sup port,therefore,the early years of secondary education as part basic education.N) As support to governments and in cooperation with other international agencies,U NESC0:Works to define life skills better and clarify what it means to teach and learn th em.Assists education. policy makers and teachers to develop and use a life skills approac h to education.Advocates for the links between a life skills approach to education and br oader society and human development.46.The recognition of life skills as part of education will promote the development o f human potential and society.47.The abilities to make the most of life consist of the inner capacities and the prac tical skills.48.The progress in psycho—social skills can be measured by changed behavior.49.Governments should examine and adapt the processes and content of education so as to balance the academic input and life skills development.50.According to Jacques Delors,four pillars of education include learning to know, learning to be,learning to live together and learning to do.51.The funding agencies should link primary education and secondary education to make sure that children develop strong life skills.52.Learning literacy may exert an influence on self-esteem,critical thinking and co mmunication skills.53.One function of UNESCO is to help educational policy makers and teachers to d evelop and use a life skills approach to education.54.Learning vocational skills can be an approach to acquiring both practical and psy cho—social skills.55.The abilities to manage stress and feelings,self-awareness,self-confidence are pe rsonal abilitiesSection B促进年轻人和成年人的学习和技能A)这个目标以“终生学习”为背景,将重点放在年轻人和成年人的学习需要上。

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Directions:In this section,you are going to read a passage with ten statements attached to it.Each statement contains information given in one of the paragraphs.Identify the paragraph from which the information is derived.You may choose a paragraph more than once.Each paragraph is marked with a letter.长篇阅读Paper--More than Meets the EyeA)We are surrounded by so much paper and card that it is easy to forget just how complex it is.There are many varieties and grades of paper materials,and whilst it is fairly easy to spot the varieties,it is far more difficult to spot the grades.B)It needs to be understood that most paper and card is manufactured for a specific purpose,so that whilst the corn-flake packet may look smart,it is clearly not something destined for the archives.It is made to look good,but only needs a limited life span.It isalso much cheaper to manufacture than high grade card.C)Paper can be made from an almost endless variety of cellulose-based material which will include many woods,cottons and grasses or which papyrus is an example and from where we get the word"paper".Many of these are very specialized,but the preponderance of paper making has been from soft wood and cotton or rags,with the bulk being wood-based.Paper from WoodD)In order to make wood into paper it needs to be broken down into fine strands.Firstly by powerful machinery and then boiled with strong alkalies such as caustic soda,until a fine pulp of cellulose fibers is produced.It is from this pulp that the final product is made, relying on the bonding together of the cellulose into layers.That,in a very small nutshell, is the essence of paper making from wood.However,the reality is rather more complicated. In order to give us our white paper and card,the makers will add bleach and other materials such as china clay and additional chemicals.E)A further problem with wood is that it contains a material that is not cellulose. Something called lignin.This is essential for the tree since it holds the cellulose fibres together,but if it is incorporated into the manufactured paper it presents archivists with a problem.Lignin eventually breaks down and releases acid products into the paper.This will weaken the bond between the cellulose fibers and the paper will become brittle and look rather brown and careworn.We have all seen this in old newspapers and cheap paperback books.It has been estimated that most paper back books will have a life of not greater than fifty years.Not what we need for our archives.F)Since the lignin can be removed from the paper pulp during manufacture,the obvious question is"why is it left in the paper?"The answer lies in the fact that lignin makes up a considerable part of the tree.By leaving the lignin in the pulp a papermaker can increase his paper yield from a tree to some95%.Removing it means a yield of only35%.It is clearly uneconomic to remove the lignin for many paper and card applications.G)It also means,of course,that lignin-free paper is going to be more expensive,but that is nevertheless what the archivist must look for in his supplies.There is no point whatsoever in carefully placing our valuable artifacts in paper or card that is going to hasten their demise.Acid is particularly harmful to photographic materials,causing them to fadeand is some cases simply vanish!H)So,how do we tell a piece of suitable paper or card from one that is unsuitable?You cannot do it by simply looking,and rather disappointingly,you cannot always rely on the label."Acid-free"might be true inasmuch as a test on the paper may indicate that it is a neutral material at this time.But lignin can take years before it starts the inevitable process of breaking down,and in the right conditions it will speed up enormously.I)Added to this,as I have indicated earlier,paper may also contain other materials added during manufacture such as bleach,china clay,chemical whiteners and size.This looks like a bleak picture,and it would be but for the fact that there are suppliers who will guarantee the material that they sell.If you want to be absolutely sure that you are storing in,or printing on,the correct material then this is probably the only way.J)Incidentally,acids can migrate from material to material.Lining old shoe boxes with good quality acid-free paper will do little to guard the contents.The acid will get there in the end.Paper from RagK)Paper is also commonly made from cotton and rag waste.This has the advantage of being lignin-free,but because there is much less cotton and rag than trees,it also tends to be much more expensive than wood pulp paper.You will still need to purchase from a reliable source though,since even rag paper and card can contain undesirable additives.L)A reliable source for quality rag papers is a recognized art stockiest.Many water color artists insist on using only fine quality rag paper and board.M)The main lesson to learn from this information is that you cannot rely on purchasing archival materials from the high street.The only safe solution is to purchase from specialist suppliers.It may cost rather more,but in the end you will know that your important and valuable data and images have the best home possible.1.The corn-flake packet is cheaper than high grade card.2.There are a lot of materials which can be used for making paper,but the superiority ones are soft wood,cotton and rags.3.During the whole manufacturing process,the final product is made from a pulp of cellulose fibres.4.In order to make white paper and card,the makers will add bleach.5.Liguin is essential for the tree but it will make paper easy to break.6.Many paper producers will preserve lignin during manufacture,because leaving the lignin will make more paper from a tree.7.Acid is particularly harmful to photographic materials.8.If the lignin is removed from the paper,the paper will be more expensive.9.Although free of lignin,paper made from cotton and rag waste can also cost more money than wood pulp paper because there is much less cotton and rag than trees.10.What we can learn from"Paper from Rag"is that you had better buy archival materials from specialist suppliers.文章精要:本文主要介绍了我们平常所见所用的纸的复杂性,通过介绍用木头和破布料造纸的过程,使我们对纸的类别、属性有了更深入的了解。

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