英语四级阅读和答案
Passage Eleven (The Affect of Electricity on Cancer)
Can electricity cause cancer? In a society that literally runs on electric power, the very idea seems preposterous. But for more than a decade, a growing band of scientists and journalists has pointed to studies that seem to link exposure to electromagnetic fields with increased risk of leukemia and other malignancies. The implications are unsettling, to say the least, since everyone comes into contact with such fields, which are generated by everything electrical, from power lines and antennas to personal computers and micro-wave ovens. Because evidence on the subject is inconclusive and often contradictory, it has been hard to decide whether concern about the health effects of electricity is legitimate—or the worst kind of paranoia.
Now the alarmists have gained some qualified support from the U.S. Environmental Protection Agency. In the executive summary of a new scientific review, released in draft form late last week, the EPA has put forward what amounts to the most serious government warning to date. The agency tentatively concludes that scientific evidence “suggests a casual link”between extremely low-frequency electromagnetic fields—those having very longwave-lengths—and leukemia, lymphoma and brain cancer, While the report falls short of classifying ELF fields as probable carcinogens, it does identify the common 60-hertz magnetic field as “a possible, but not proven, cause of cancer in humans.”
The report is no reason to panic—or even to lost sleep. If there is a cancer risk, it is a small one. The evidence is still so controversial that the draft stirred a great deal of debate within the Bush Administration, and the EPA released it over strong objections from the Pentagon and the Whit House. But now no one can deny that the issue must be taken seriously and that much more research is needed.
At the heart of the debate is a simple and well-understood physical phenomenon: When an electric current passes through a wire, tit generates an electromagnetic field that exerts forces on surrounding objects, For many years, scientists dismissed any suggestion that such forces might be harmful, primarily because they are so extraordinarily weak. The ELF magnetic field generated by a video terminal measures only a few milligauss, or about one-hundredth the strength of the earth’s own magnetic field, The electric fields surrounding a power line can be as high as 10 kilovolts per meter, but the corresponding field induced in human cells will be only about 1 millivolt per meter. This is far less than the electric fields that the cells themselves
generate.
How could such minuscule forces pose a health danger? The consensus used to be that they could not, and for decades scientists concentrated on more powerful kinds of radiation, like X-rays, that pack sufficient wallop to knock electrons out of the molecules that make up the human body. Such “ionizing”radiations have been clearly linked to increased cancer risks and there are regulations to control emissions.
But epidemiological studies, which find statistical associations between sets of data, do not prove cause and effect. Though there is a body of laboratory work showing that exposure to ELF fields can have biological effects on animal tissues, a mechanism by which those effects could lead to cancerous growths has never been found.
The Pentagon is for from persuaded. In a blistering 33-page critique of the EPA report, Air Force scientists charge its authors with having “biased the entire document” toward proving a link. “Our reviewers are convinced that there is no suggestion that (electromagnetic fields) present in the environment induce or promote cancer,” the Air Force concludes. “It is astonishing that the EPA would lend its imprimatur on this report.” Then Pentagon’s concern is understandable. There is hardly a unit of the modern military that does not depend on the heavy use of some kind of electronic equipment, from huge ground-based radar towers to the defense systems built into every warship and plane.
1.The main idea of this passage is
[A]. studies on the cause of cancer
[ B]. controversial view-points in the cause of cancer
[C]. the relationship between electricity and cancer.
[D]. different ideas about the effect of electricity on caner.
2.The view-point of the EPA is
[A]. there is casual link between electricity and cancer.
[ B]. electricity really affects cancer.
[C]. controversial.
[D].low frequency electromagnetic field is a possible cause of cancer
3.Why did the Pentagon and Whit House object to the release of the report? Because
[A]. it may stir a great deal of debate among the Bush Administration.
[ B]. every unit of the modern military has depended on the heavy use of some kind of electronic equipment.
[C]. the Pentagon’s concern was understandable.
[D]. they had different arguments.
4.It can be inferred from physical phenomenon
[A]. the force of the electromagnetic field is too weak to be harmful.
[ B]. the force of the electromagnetic field is weaker than the electric field that the cells generate.
[C]. electromagnetic field may affect health.
[D]. only more powerful radiation can knock electron out of human body.
5.What do you think ordinary citizens may do after reading the different arguments?
[A].They are indifferent. [ B]. They are worried very much.
[C]. The may exercise prudent avoidance. [C]. They are shocked. Vocabulary：
1. preposterous 反常的，十分荒谬的，乖戾的
2. leukemia 白血病
3. malignancy 恶性肿瘤
4. legitimate 合法的，合理的
5. paranoia 偏执狂，妄想狂。这里指：无根据的担心。
6. lymphoma 淋巴瘤
7. carcinogen 致癌物
8. minuscule 很小的，很不重要
9. consensus 舆论
10. wallop 乱窜，猛冲，冲击力
11. epidemiological 流行病学的
12. blistering 罗嗦的，胡扯的
13. critique 评论，批评
14. imprimatur 出版许可（官方审查后的），批准
难句译注：
1.Because evidence on the subject is inconclusive and often contradictory, it has been hard to decide whether concern about the health effects of electricity is legitimate—or the worst kind of paranoia.
[参考译文] 由于这问题的证据还不是结论性的，而且常常是矛盾的，所以就难以断定有关电力对身体的影响的顾虑是合乎情理，还是毫无根据的怀疑。
2. EPA——U.S. Environmental Protection Agency 美国环境保护署3．While the report falls short (缺乏，不够) of classifying ELF fields as probable carcinogens, it does identify the common 60-hertz magnetic field as
“a possible, but not proven, cause of cancer in humans.”
[参考译文] 虽然报告没有把极低频磁场归类为可能致癌物，但它确实指出通常60赫兹的磁场是“一种虽尚未证实，但可能导致人患癌症的因素。”
4．The evidence is still so controversial that the draft stirred a great deal of debate within the Bush Administration, and the EPA released it over strong objections from the Pentagon and the Whit House
[参考译文] 证据争议性仍然很大，所以报告草案在布什政府内引起巨大的争辩，而环保署无视无角大楼和白宫的强烈反对，公布了这份报告。
5.This is far less than the electric fields that the cells themselves generate. [参考译文] 这远比细胞所产生的电磁场低的多。
6.…and for decades scientists concentrated on more powerful kinds of radiation, like X-rays, that pack sufficient wallop to knock electrons out of the molecules that make up the human body.
[参考译文] 而且几十年来，科学家专注于更为强大的辐射类别，如Ｘ光射线，其聚合的冲击力足以把电子从组成人体的分子中撞出来。
7.But epidemiological studies, which find statistical associations between sets of data, do not prove cause and effect.
[参考译文] 可是流行病学的研究发现，几组资料在数据方面有所关联，却没有证实其因果关系。
8. a body of laboratory work 一批研究成果。
9.In a blistering 33-page critique of the EPA report, Air Force scientists charge its authors with having “biased the entire document” toward proving a link.
[参考译文] 在长达33页的对环保署文件的十分尖锐的批评中，空军方面的科学家指责，作者歪曲整个文件以证明癌症和电磁场之间的关联。10.It is astonishing that the EPA would lend its imprimatur on this report. [参考译文] 令人惊讶的是环保署竟然批准许可这份报告的出笼。
写作方法与文章大意：
文章以问答的方式，对比的写作方法，写出了围绕电力是否影响健康——是否致癌因素的两种观点，及其观点的依据。一种是美国环境保护署为代表的：极低频磁场是一种可能但还未被证实的致癌因素，而且无视白宫和五角大楼反对，公布了这份报告。理由是科学证据提出了两者之间的关联偶然性。另一种以空军中科学家为主的观点：电磁场不会诱发或触发癌症，而且以歪曲整个文件来证明两者之关系，批评了环保署。其理由人人皆知。因军队中任一单位都有点——从地面雷达到舰艇飞机防卫系统。
参考答案+详解：
1.D 电力对癌症影响的不同观点。文章一开始就提出了“电会致癌吗？”这个问题。十多年来，一大批科学家和新闻界人士都指出：研究结果似乎表示：接触电磁场可能会增加患白血病和其他恶性肿瘤的危险性。所以说到目前为止还难以确定电力对健康的影响究竟是理性的，还是杞人忧天。见难句注释1。第二段公布了环保署的报告，见难句注释3。第三段说明：即使有致癌危险也是极微的。但应予以认真对待，进行更多的研究。而第七段中空军方面的科学家还没有被说服（见难句注释9），明确提出，我们的评论员认为没有迹象说明环境中存在的电力会诱发或促发癌症。
A. 对致癌因素的研究。
B. 致癌原因方面有争议的观点，这两项根本部队，和文内电力毫无关系。
C. 电力和癌症的关系，文中涉及的是电力究竟会不会致癌的两种观点，而不是两者之关系。
2.A. 电和致癌有一定难以确定的关系。答案在第二段第三句，环保署目前的结论是据科学证据指出极低频电磁场——具有长波的电磁场——和白血病，淋巴瘤及脑癌之间有着难以确定的联系，见难句注释3。
A. 电确实致癌，不对。 C. 有争议的。说的不够清楚，争议什么。 D. 低频磁场是一个可能致癌因素。这只是论点的一面。
3.B. 现代军事的任何部门都一直依赖于应用大量应用电子设备。五角大楼和白宫所以反对环保署公布报告之理由就在此。空军方面的专家所以说环保署方面的报告“歪曲了整个文件以证明两者之间的关系”也在此。见难句注释4。所以文内说“角大楼的关注是可以理解的。”
A. 报告会在布什政府内引起大规模的辩论，这是结果。C. 五角大楼的关注是可以理解的，这不是原因。 D. 他们有不同的观点。
4.磁场力太弱不会产生有害作用。答案在第四段第二，三句，当电流通过电缆，产生磁场，对周围物体产生（影响）力。许多年来，科学家把任何有关“这些力可能有害的想法”置于一边（不予考虑），主要是因为它们（所产生的力）非常弱。
B. 磁场力比细胞产生的电磁场弱。只是明确指出的事实。
C. 磁场力对人的健康有害。不对。
D. 只有更强的辐射才能把人体中的电子击出来。不对。
5.C. 他们会采取谨慎小心避开电器的途径。因为他们不可能象A项那样漠不关心。这种问题直接影响人的生命。
B. 他们非常担忧。D. 他们感到震惊，这两项都不可能，因为还在争议中，唯一的途径是尽量避开和电器接触
专家解析英语四级考试历年阅读真题(一)
2洛基英语，中国在线英语教育领导品牌 2007.12阅读第一篇 Passage One Questions 57 to 61 are based on the following passage. In this age of Internet chat, videogames and reality television, there is no shortage of mindless activities to keep a child occupied. Yet, despite the competition, my 8-year-old daughter Rebecca wants to spend her leisure time writing short stories. She wants to enter one of her stories into a writing contest, a competition she won last year. As a writer I know about winning contests, and about losing them. I know what it is like to work hard on a story only to receive a rejection slip from the publisher. I also know the pressure of trying to live up to a reputation created by previous victories. What if she doesn’t win the contest again? That’s the strange thing about being a parent. So many of our own past scars and dashed hopes can surface. A revelation (启示) came last week when I asked her, “Don’t you want to win again?”“No,”she replied, “I just want to tell the story of an angel going to first grade.” I had just spent weeks correcting her stories as she spontaneously (自发地) told them. Telling myself that I was merely an experienced writer guiding the young writer across the hall, I offered suggestions for characters, conflicts and endings for her tales. The story about a fearful angel starting first grade was quickly “guided”by me into the tale of a little girl with a wild imagination taking her first music lesson. I had turned her contest into my contest without even realizing it. Staying back and giving kids space to grow is not as easy as it looks. Because I know very little about farm animals who use tools or angels who go to first grade, I had to accept the fact that I was co-opting (借用) my daughter’s experience. While stepping back was difficult for me, it was certainly a good first step that I will quickly follow with more steps, putting myself far enough a way to give her room but close enough to help if asked. All the while I will be reminding myself that children need room to experiment, grow and find their own voices. 注意：此部分试题请*考试&大在答题卡2上作答。 57. What do we learn from the first paragraph? A) A lot of distractions compete for children’s time nowadays. B) Children do find lots of fun in many mindless activities. C) Rebecca is much too occupied to enjoy her leisure time. D) Rebecca draws on a lot of online materials for her writing. 58. What did the author say about her own writing experience? A) She was constantly under pressure of writing more. B) Most of her stories had been rejected by publishers. C) She did not quite live up to her reputation as a writer. D) Her way to success was full of pains and frustrations.
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大学英语四级快速阅读技
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大学英语四级阅读理解试题及标准答案.
大学英语四级阅读理解试题及答案.
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3 大学英语四级阅读理解试题及答案（四） 十六 Trees should only be pruned when there is a good and clear reason for doing so and , fortunately,the number of such reasons is small. Pruning involves the cutting away of obergrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way. First, pruning may be done to make sure that trees have a desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut diseaed or dead wood, or branches that are rubbing against each other and thus cause wounds. The health of a tree may be encouraged by removing branches that are blocking up the centre and so preventing the free movement of air. One result of pruning is that an open wound is left on the tree and this provides an easy entry for disease, but itis a wound that will heal. Often there is a race between the healing and the desease as to whether the tree will live or die, so that there is a period when the tree is at risk. It should be the aim of every gardener to reduce which has been pruned smooth and clean, for healing will be slowed down by roughness. You should allow the cut surface to dry for a few hurs and then paint it with one of the substances available from garden shops produced especially for this purpose. Pruning is usually without interference from the leaves and also it is very unlikely that the cuts yu make will bleed. If this does happen,it is, of course,impossible to paint them properly. 1.Pruning should be done to ______. a.make the tree grow taller
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英语四级真题阅读理解(带翻译)
Passage1 Reading leadership literature, you’d sometimes think that everyone has the potential to be an effective leader. 读领导文学，你有时会认为每个人都有可能成为一个有效的领导者。 I don’t believe that to be true. In fact, I see way fewer truly effective leaders than I see people stuck in positions of leadership who arc sadly incompetent and seriously misguided about their own abilities. 我不相信这是真的。事实上，我认为真正有效的领导者的方式比我看到的人都陷在领导的职位上，遗憾的是他们自己的能力不称职，严重误导了他们。 Part of the reason this happens is a lack of honest self-assessment by those who aspire to（追求）leadership in the first place. 对产生这种现象的原因一部分是由那些渴望缺乏诚实的自我评估（追求）放在首位的领导 We've all met the type of individual who simply must take charge. Whether it's a decision-making session, a basketball game, or a family outing, they can't help grabbing the lead dog position and clinging on to it for dear life. They believe they're natural born leaders. 我们都遇到了个人的类型，他们必须负责。无论是决策会议，篮球比赛，还是家庭外出，他们都不能不抓住领导的狗的地位，并紧紧抓住它，因为亲爱的生命。他们相信他们是天生的领袖。 Truth is, they're nothing of the sort. True leaders don't assume that it's their divine（神圣的）right to take charge every time two or more people get together. Quite the opposite. A great leader will assess each situation on its merits, and will only take charge when their position, the situation, and/or the needs of the moment demand it. 事实是，他们没有什么样的。真正的领导者不认为这是他们的神圣（神圣的）负责每次两个或两个以上的人在一起吧。恰恰相反。一个伟大的领导者会对每一个情况进行评估，并在他们的位置、情况和/或需要的情况下，只会负责。 Many business executives confuse leadership with action. They believe that constant motion somehow generates leadership as a byproduct. Faced with any situation that can’t be solved by the sheer force of activity, they generate a dust cloud of impatience. Their one leadership tool is
大学英语四级CET-4阅读理解(1)
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大学英语四级快速阅读技巧
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大学英语四级考试快速阅读理解技巧新
大学英语四级考试快速阅读技巧 一.测试目的 快速阅读，顾名思义，它的目的在于测试考生单位时间当中的阅 读量，其实四级对速度的考查是近几年一直延续的一种结果。同时， 在解答题目方面，快速阅读并不强调一定要像精读文章那样通篇认真 研究，相反，快速阅读题目更强调测试考生在实践语言环境中查询有 效信息的能力，这也反映出四六级考试试图提升考生实际应用能力的 改革方向。 二.测试形式 快速阅读要求考生在15 分钟内完成一篇1100字左右的文章和后面的 10 道题。前面 7 个题是判断正误（包括NG），后 3 个是填空题填根据阅读的理解，填三到四个单词( 答案基本都是原文中出现的原 词)。快速阅读的文章一般分为小标题+题目和无小标题+题目两种类型。该题型需要通过略读和寻读法，乃至文章逻辑关系、标点符号等方面的综合运用，实现对随后的题目有效的判断和填写。 三.基本要求 1. 快速阅读的文章基本都是专业题材的文章，很多考生可能会觉得 很陌生，但是对于 CET-4 的快速阅读开始来说，只要求考生
对题目所提到的信息在原文中能够找到即可，只是有时需要简 单的同义词替换。 2. 略读（ Skimming）和寻读（ Scanning ）的能力在大学英语四级考试中显得尤为重要。 3. 快速阅读要求考生的阅读速度是每分钟 110-140 词。 四.快速阅读方法 1.推测（prediction） 阅读正文前，就标题（如果有标题的话）来合理推测资料的 大概内容，也可在读了一段之后预测下段内容。这对快速理解和 整体把握文章内容以及推测出生词的词义范围有积极的意义。 2.读关键词句（key words and topic sentences） 在对文章的整体内容有了基本认识的基础上，我们学会抓主 要的词句，找出段落中的主题句，从而正确领会文章的主要内容。3.略读(skimming) 略读又称跳读 (reading and skipping)或浏览(glancing)，是一种专门的，非常实用的快速阅读技能。 所谓略读，是指以尽可能快的速度阅读，如同从飞机上鸟瞰(bird ’s eye view ) 地面上的明显标志一样，迅速获取文章大意或中心思想。换句话说，略读是要求读者有选择地进行阅读，可跳过某些细节，以求抓住文章的大概，从而加快阅读速度。据统计，训练有素的略读者(skimmer) 的阅读速度可以达到每分钟 3000 到 4000 个词。