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

英语四级长篇阅读段落信息匹配题练习(3)

Section B

Directions: 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 Marks

A) 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 TV

before 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 aware

of 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 li

e 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。【47】目前,有三项新的研究发现,看电视事假太长会导致学习成绩下降,妨碍学习进步,甚至影响在大学的成绩。这三项研究报告刊截在7月份的《儿科和青春期医学档案》杂志上。

B)在第一份报告中,研究人员研究在三年级学生的卧室里放置电视对他们的影响。其中的一位研究人员是约翰霍普金斯大学彭博公共卫生学院的助理教授DinaL.G.Borzekowsk i,她表示:“我们研究的是家庭媒体环境对数学、阅读和语言艺术等科目测试成绩的影响。”

C)Borzekowski和她的同事,斯坦福大学的Thomas Robinson博士,调查了386位三年级学生及其父母,收集了大量关于孩子看电视花费的时间、家中的电视机、电脑和视频游戏设备的数量及其摆放位置。他们还收集了一些关于孩子在不同媒体上所花的时间和在家庭作业与阅读上所花的时间的数据。研究人员发现,家中媒体设备的摆放位置和使用方式对孩子的学习有重要的影响。【51】Borzekowski表示:“我们发现家庭媒体环境与孩子不同的测验分数的表现有密切的关系。”

D)她表示:“卧室有电视机的孩子,其数学成绩比卧室没有电视机的孩子很可能会低8分。”而且他们的阅读和语言艺术考试成绩也相对降低。可是Borzekowski又说,【46】可以使用家庭电脑的孩子比家中没有电脑的孩子更有可能在这些科目的测试中取程更高的分数。

E)Borzekowsk表示目前关于电视会造成这种负面影响的原因尚不明确。她说:“如果孩子的卧室有电视机,家长便不太可能控制孩子们观看的内容和时间。他们也不可能知道孩子们多早或多晚打开电视机。这似乎与孩子的学习成绩有关。”【52】Bomekows】认为电视内容和观看的时间可能是导致电视机的负面影响的主要原因。“如果电视在客厅,那么家长便可以知道孩子所观看的内容,”她说。“家长可以选择坐在旁边一起观看,或者将电视机关掉。一个简单、直接、有效地方式就是不要在孩子的卧室放电视机,如果已经放了,那就搬出来吧。”

G)Hancox的研究团队还发现儿童时期看电视对从大学毕业的影响最大。他说:“一项有趣的发现是,虽然少年时期看电视很可能会导致没有毕业就离开学校,但是对能否取得学位影响最大的却是童年时期看电视。这表明,在童年时期,过度看电视会对学业造成长期持续的不利影响。”

H)在第三份报告中,Frederick J.Zimmerman和来自华盛顿大学的Dimitri A.Christak is博士认为,对于幼儿来说,看电视会导致数学、阅读认知和阅读理解的分数降低。Zimme rman表示“我们研究了孩子在3岁以前和在3到5岁之间看电视所花的时间的数量,结果发现与花许多时间看电视的孩子相比,小时候很少看电视的孩子有相当大的优势。”

J)一位专家认为,电视有积极和消极的影响,而这完全取决于孩子所看的内容。宾夕法尼亚大学的助理教授Deborah L.Linebarger曾参与编写一篇补充社论,他认为:“内容很重要。【50】教育性的内容与入学须备考试的成绩有关,有助于青少年取得更好的成绩,而非教育性的力容则往往导致学习成绩下降。”

K)另外一位专家Christopher P.Lucas博士也同意这一观点。他是纽约大学儿童研究中心幼儿评价与治疗计划的临床协调员,他认为:“看电视会占据用于做其他更有用的事情的时间。电视不一定有害处,但是看电视应该适度。为了孩子的健康发展,看电视要和孩子的其他需求保持平衡。”

L)【53】Lucae认为孩子看电视的时间和内容该完全由父母负责监督。他说:“看电视的时间太长,自然就会减少阅读或做家庭作业的时间。关键在于家长要控制孩子看电视的时间。把电视从卧室里搬出来,要知道孩子观看的内容,限制看电视的时间。”

46.According to Borzekowski,children having chances to use a family computer are l ikely to acquire better re-suits on the different tests.Borzekowski发现能接触使用家用电脑的孩子各项测试成绩一般更好。

【解析】D)。细节题。根据句中chancestouse afamily computer可将答案定位于D)段最后一句话。可是Borzekowski又说,可以使用家庭电脑的孩子比家中没有电脑的孩子更有可能在这些科目的测试中取得更高的分数.

47.The reports issued in the Archives of Pediatrics&Adolescents Medicine find that watching too much TV leads to poor perform ancein sch001.《儿科和青春期医学档案》杂志研究发现看电视时间太长会导致学习成绩差。

【解析】A)。细节题。根据句中the Archives of Pediatrics& Adolescents Medicine可将答案定位于Al段后两句。目前,有三项新的研究发现,看电视时间太长会导致学习成绩下降,妨碍学习进步,甚至影响在大学的成绩。这三项研究报告刊载在7月份的《儿科和青春期医学档案》杂志上。

48.Watching more than three hours of TV before age 3 has bad effect on kids.三岁前每天看电视三个小时以上会对孩子产生不好的影响。

【解析】I)。细节题。根据句中more than three hours of TV before age 3可将答案定位于I)段第三四句话。最糟糕的便是在3岁之前每天看3个小时以上的电视。与其他孩子相比,他们会有较大的劣势。

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.

第二则报告显示:一个人能否获取大学学位取决于他少年期看电视的时间。

【解析】F)。归纳题。根据句中the chance for one to acquire a college degree可将答案定位于F)段。F段整段的中心意思就是少年期看电视越多越不容易获得大学学位,反之亦然。

50.In Deborah L.Lingbarger’s opinion,educational content is helpful for teenagers to get better results on school readiness tests.Deborah L.Ling barger认为(电视上的)教育性内容可以帮助青少年在入学预备考试中取得更好的成绩。

【解析】J)。细节题。根据句中educational content可将答案定位于J)段末句。内容很重要。教育性的内容与入学预备考试的成绩有关,有助于青少年取得更好的成绩,而非教育性的内容则往往导致学习成绩下降。

51.enviro nment of family media greatly affects children’s test Scorcs according to t he first report.

第一则报告发现,家庭媒体环境极大地影响孩子的测试成绩。

【解析】C)。细节题。根据句中environment of family media可将答案定位于C)段末句。我们发现家庭媒体环境与孩子不同的测验分数的表现有密切的关系。

52.Borzekowski believes that TV’s negative effect on children’s marks may mainly l ie in what children watch on TV and how much time they spend on it.Borzekowski认为电视给孩子的成绩带来负面影响,原因主要在于其收看内容和时长。

【解析】E)。细节题。根据句中TV’s negative effect可将答案定位于E)段,此段整段都在探讨电视负面效应的原因。其中一句尤为点题:Borzekowskibelieves that content and t

he lime the"IV is on may be the primary reasons for its negative effect.Borzekowski认为电视内容和观看的时间可能是导致电视机的负面影响的主要原因。What children watch on TV and how much time they spend on it是.content and the time的同类表述。

53?Lucas thinks parents should take the responsibility to supervise kids’TV watchi n.Lucas认为父母有责任监督孩子看电视。

【解析】L)。细节题。根据句中parents should take the responsibility可将答案定位于L)段首句。Lucas认为孩予看电视的时间和内容应该完全由父母负责监督。

54.According to the recommendation from American Academy of Peadialrics,children under 2 should watch TV.

美国小儿科协会建议不要让两岁以下孩子看电视。

【解析】I)。细节题。根据句中Amcerican Academy of Peadiatrics和under2可将答案定位于I)段倒数第二句。Zimmerman表示家长应该听从美国小儿科学会的建议,不要让2岁以下的孩子看电视。

55.Hancox thinks earlier childhood TV watching affects one’s acquiring a college de gree most.

Hancox认为儿童早期看电视最影响一个人能否获取大学学位。

【解析】G)。细节题。根据句中earlier childhood和college degree可将答案定位于G)段第二句。一项有趣的发现是,虽然少年时期看电视很可能会导致没有毕业就离开学校,但是对能否取得学位影响最大的却是童年时期看电视。

大学英语四级段落信息匹配题技巧

英语四、六级段落信息匹配题 一、英语四级段落信息匹配题是什么? 长篇阅读理解篇章后附有10个句子,每句一题。每句所含的信息出自篇章的某一段落,要求考生找出与每句所含信息相匹配的段落。有的段落可能对应两题,有的段落可能不对应任何一题。四级考试需要各位同学做的是,大家需要去看十个左右的段落,然后去匹配十个信息点。但是到六级当中,我们的难度就要增加了,我们见到的情况是六级当中变成了15个段落,去匹配十个信息点。但总体来看,不管题型怎么变,其实学习方法没变,还是仍旧需要大家提高阅读的能力,比如说读文章的时候,是不是直接拿英语读,如果读快速阅读的时候,还是拿中文边翻译边读的话,会发现阅读速度一直会比较慢,所以那么长的文章很难找到细节,所以大家一定要养成拿英语直接阅读的这样一种习惯,这样才能保证我们的阅读速度又快又准。 二、信息匹配题难点分析 1. 考生难以按照阅读题一贯遵循的“顺序原则”解题。由于这一题型要求考生把细节信息与其所在的段落进行匹配,因此细节信息的排列绝对是“乱序的”,这就意味着考生从文章开头到结尾按顺序定位的方法是行不通的。

2. 题干信息复杂,考生难以迅速抓住要领。题干中的细节信息通常是极复杂和繁琐的名词短语或长难句,考生往往在寻找到合适的定位词之前,就已经被题干信息的复杂表述弄得晕头转向了。 3. 考生难以寻找到合适的定位词。即使考生能够读懂题干中晦涩难懂的细节信息,但也会在寻找定位词时遇到很大障碍。因为题干提供的细节信息中往往不会出现非常明显的定位词(如数字、时间、地点、人物、特殊字体和特殊符号等)。即使考生能够找到一个定位词,这一定位词也

通常和文章主题密切相关,会在文章中多次出现,因而也没有太大的意义。 三、匹配题出题特点及应试技巧 匹配类题型有很多种,常见的种类有:1)人名-观点匹配;2).地名-描述匹配;3)句子-句子匹配;4)分类题(Classification);5)段落-标题匹配;6段落-细节匹配。其中前四种做题方法比较类似,而后两种相对较复杂。这里将阐述前四种题型的做题方法。 1. 扭转做题思维

最新大学英语四级匹配题+详解

长篇阅读——匹配题 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. Answer the questions by marking the corresponding letter on Answer Sheet 2. Passage 1 Paper —More than Meets the Eye A) 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 is also much cheaper to manufacture than high grade card. C) Paper can be made from an almost endless variety of cellulose(纤维素化合物)-based material which will include many woods, cottons and grasses of 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 Wood D) 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(碱) 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 paperback books will have a life of no 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 some 95%. Removing it means a yield of only 35%. It is clearly uneconomic to remove the lignin for many paper and card applications. It also means, of course, that lignin-free paper is going to be more expensive. G) However, it 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 fade and in 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 Rag K) 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

2019年12月英语四级阅读段落信息匹配训练及答案(8)

2019年12月英语四级阅读段落信息匹配训练及答案 (8) 段落信息匹配题是四六级改革之后的新题型,很多同学还不是很熟悉,以下是小编为同学们整理的英语四级长篇阅读段落信息匹配题练习,希望对各位有所协助。 The Art of Friendship A) One evening a few years ago I found myself in an anxiety. Nothing was really wrong my family and I were healthy, my career was busy and successful -- I was just feeling vaguely down and in need of a friend who could raise my spirits, someone who would meet me for coffee and let merant until the clouds lifted. I dialed my best friend, who now lives across the country in California, and got her voicemail. That's when it started to dawn on me -- lonesomeness was at the root of my dreariness. My social life had dwindled to almost nothing, but somehow until that moment I'd been too busy to notice. Now it hit me hard. My old friends, buddies since college or even childhood, know everything about me; when they left, they had taken my context with them. B) Research has shown the long-range negative consequences of social isolation on one's health. But my concerns were more short-term. I needed to feel understood right then in the way that only a girlfriend can understand you. I knew it would be wrong to expect my husband to replace my friends: He couldn't, and even if he could, to whom would I then complain about my husband? So I resolved to acquire

12月英语四级长篇阅读匹配试题

12月英语四级长篇阅读匹配试题2016年12月英语四级长篇阅读匹配试题 BeingObjectiveonClimateChange https://www.360docs.net/doc/138278397.html,stweek,CraigRucker,aclimate-changeskepticandtheexecutivedirectorofanonprofitorganizatio ncalledtheCommitteeforaConstructiveTomorrow(CFACT),tweetedaquotationsupposedlytakenfroma1922editionoftheWashin gtonPost: “Withinafewyearsitispredictedduetoicemeltthese awillrise&ma kemostcoastalcitiesuninhabitable.”Theintent,ofcourse,wastopokefunatcurrentheadlinesaboutclimatechange. B.Rucker’sorganizationisamemberoftheCoolerHeadsCoalitio n,anumbrellaorganizationoperatedbytheCompetitiveEnterpriseIns titute,anonprofitthatpridesitselfonitsoppositiontoenvironmentalist s.Ruckerhimselfispartofanetworkofbloggers,op-cdwriters,andpolicy-shopexecutiveswhoarguethatclimatechangeiseitherahoaxorallex ampleofleft- winghysteria.Surfacingoldnewspaperclipsisoneoftheirfavorite games.Theyalsomakesubstantiveargumentsaboutclimatepolicy,bu tthesnipingmaybemoreeffective.Thereisnostrongerrhetoricalto olthanridicule. C.Inthiscase, Ruckcr’sridiculeseemsmisplaced.Afterspendingafewminutespok ingaroundonline,

大学英语四级匹配题详解

大学英语四级匹配题详 解 Pleasure Group Office【T985AB-B866SYT-B182C-BS682T-STT18】

长篇阅读——匹配题 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. Answer the questions by marking the corresponding letter on Answer Sheet 2. Passage 1 Paper — More than Meets the Eye A) 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 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 is also much cheaper to manufacture than high grade card. C) Paper can be made from an almost endless variety of cellulose(纤维素化合物)-based material which will include many woods, cottons and grasses of which is an example and from where we get the word "paper". Many of these are very specialized, but the of paper making has been from soft wood and cotton or , with the bulk being wood-based. Paper from Wood D) In order to make wood into paper it needs to be broken down into fine strands. Firstly by powerful and then boiled with strong alkalies(碱) such as caustic soda, until a fine of 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 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 . 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 paperback books will have a life of no 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 some 95%. Removing it means a yield of only 35%. It is clearly uneconomic to remove the lignin for many paper and card applications. It also means, of course, that lignin-free paper is going to be more expensive. G) However, it is nevertheless what the 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 their . Acid is particularly harmful to photographic materials, causing them to fade and in 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

大学英语四级阅读题段落匹配练习题

大学英语四级阅读题段落匹配练习题 难点: 1、顺序原则被打乱 2、题目本身涉及长难句 3、定位词不明显 4、对应数量关系不唯一 做题步骤: 1、先题后文 2、逐段做题 3、拒绝投机取巧

2014 -6 46.Authors still published in printed versions will be considered important ones. 47.Some people are still in favor of printed books because of the sense of touch they can provide. 48.The radio business has changed greatly and now attracts more listeners. 49.Contrary to many peoples prediction of its death.the film industry survived. 50.Remarkable changes have taken place in the book business. 51.Old technology sometimes continues to exist because of its reliability. 52.The increase of e-book sales will force the book business to make changes not seen for centuries. 53.A new technology is unlikely to take the place of an old one without a clear advantage. 54.Paperbacks of popular literature are more likely to be replaced by e-books. 55.A house with a fireplace has a stronger appeal to buyers. 2013-12 46.Caplan suggests that kids who dont love school go to work. 47.An increasing number of families spend more money on houses in a good school district.. 48.Subsidized loans to college students are a huge waste of money. according to one economist. 49.More and more kids find they fare worse with a college diploma. 50.For those who are not prepared for higher education.going to college is not worth it. 51.Over the years the cost of a college education has increased almost by 100%. 52.A law passed recently allows many students to pay no more than one tenth of their income for their college loans. 53.Middle-class Americans have highly valued a good education. 54.More kids should be encouraged to participate in programs where they can learn not only job skills but also social skills. 55.Over fifty percent of recent college graduates remain unemployed or unable to find a suitable job. 2013-12 The rise of the sharing economy A)Last night 40.000 people rented accommodation from a service that offers 250.000 rooms in 30.000 cities in 192 countries.They chose their rooms and paid for everything online.But their beds were provided by private individuals.rather than a hotel chain.Hosts and guests were matched up by Airbnb.a firm based in San

大学英语四级信息匹配练习题

大学英语四级信息匹配练习题一 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 Preparing for Computer Disasters A) Summary: When home office computers go down, many small businesses grind to a halt. Fortunately, taking steps to recover from disasters and minimize their effects is quite straightforward. B) Fires, power surges, and floods, they're all facts of life. We read about them in the morning paper and see them on the evening news. We sympathize with the victims and commiserate over their bad luck. We also shake our heads at the digital consequences—melted computers, system failures, destroyed data. Yet, somehow, many of us continue to live by that old mantra of denial: "It won't happen to me." Well, the truth is, at some point you'll probably have to deal with at least one disaster. That's just how it goes, and in most aspects of our lives we do something about it. We buy insurance. We stow away provisions. We even make disaster plans and run drills. But for some reason, computer disaster recovery is a blind spot for many of us. It shouldn't be. Home computers contain some of our

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 B Directions: 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 Marks A) 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.

相关文档
最新文档