Unit5 Beyond Babies不要孩子 在雅典市中心繁华的柯诺那基广场的时尚的初音岛咖啡店里，三十多岁或四十出头的希腊语专业人员沉浸在冰卡布奇诺咖啡里，过奢侈的生活。他们最喜欢谈论的话题是，当然，关系：男子不愿承诺，女性的独立，何时有孩子，或者说，逐渐是否有他们所有。“随着时间的推移，我有一个孩子的机会越来越小，37岁的行政助理美联社新闻社说。“但我不会只是因为要一个孩子而嫁给任何人。”她热爱她的工作，并从她那些紧密团结、志同道合的朋友那里得到她的社会支持，对于希腊年轻人来说，这些朋友渐渐充当了家人的角色。“如果在45岁，我仍然膝下无子，我会考虑要一个自己的孩子，”她说。但这并不意味着她个人成就取决于它。 在几十年前，Petropoulou和她的朋友们可能已经被认为是，嗯，奇怪的。希腊被称为欧洲最传统的社会，在那里东正教的对于结婚和繁衍的严格戒律当道。.强大的社会和宗教禁忌的标记是像不能怀孕的老处女一样的妇女无子，和对中年男子性偏好单一的怀疑。渐渐地，在一代人期间，由于诸多因素，包括女性接受更好的教育和就业选择以及希腊融入欧盟的主流文化，那种严格的社会限制基本上已经消失了。结果是：结婚率低于欧盟的平均水平，并在每名妇女生育平均为1.3，是世界上最低的生育率。这样的年轻希腊人，如果时间恰当拥有孩子是不错的。但他们肯定不是必不可少的。 在希腊，和世界上大部分地区，在激增的人口数下，有孩子们不再是一个想当然的事情。“在许多社会里从未有过无子女的女性和男性是合法的现象。”，研究在伦敦经济学院研究此现象的凯瑟琳哈基姆说。在像瑞士和新加坡、加拿大和韩国这类迥异国度中发生了急剧的社会变迁，年轻人把生育推迟到30好几，甚
1 While some studies have suggested that frequent use of cell phones causes increased risk of brain and mouth cancers, others have found no such links. But since cell phones are relatively new and brain cancers grow slowly, many experts are now recommending taking steps to reduce exposure. by bruce stutz 一些研究显示，经常使用手机会增加得脑部和口腔癌症的几率。有的研究却没发现两者之间有什么联系。但是，手机算是个新兴事物，而脑癌发展也缓慢，许多专家还是建议减少使用手机。 2 Does your cell phone increase your risk of brain cancer? Does it affect your skin or your sperm viability? Is it safe for pregnant women or children? Should you keep it in your bag, on your belt, in your pants or shirt pocket? Should you use a hands-free headset? Are present cell phone safety standards strict enough? 手机会增加得脑癌的几率吗？会不会影响皮肤或者精子活性？使用手机对孕妇或孩子安全吗？应该把手机放在哪，包里、衣服口袋，还是挂在腰带上？打电话的时候要用耳机吗？现在的手机安全标准够不够严？ 3 You don’t know? You’re not alone. 你不知道？这很正常。 4 With some 4 to 5 billion cell phones now in use worldwide and hundreds of studies seeking evidence of their health effects published in peer-reviewed journals over the last 10 years, there’s precious little scientific certainty over whether cell phones pose any danger to those using them. For nearly every study that reports an effect, another, just as carefully conducted, finds none. All of which leaves journalists, consumer advocates, regulatory agencies, politicians, industry spokespersons, and cell phone users able to choose and interpret the results they prefer, or ignore the ones they don’t. 如今，全世界共有40-50亿手机正在使用。过去十年里，成百上千的研究也在致力于寻找手机影响健康的证据，并在相关刊物上发表论文。但还没有确凿的证据能证明，使用手机损害健康。几乎没有研究发现手机对健康有不良影响。但这还是没影响到政治家、新闻记者、管理机构、产业发言人、消费者保护团体，还有消费者自己，选择他们喜好的结果去理解，忽略不喜欢的那些。 5 Do you, for instance, cite the studies that report adverse effects on sperm viability and motility, due to exposure to cell phone radiation or the studies that showed no —or mixed —results? 6 Do you cite the 2001 study that found increased incidence of uveal melanoma (a cancer of the eye) among frequent cell phone users, or the 2009 study by the same authors that, in reassessing their data, found no increase? 2001年的研究显示，常用手机的人患葡萄膜黑色素瘤（一种眼内癌症）几率会增大。2009年这些研究员又发表报告称，他们再分析当年的数据时，又不能确
Part I Reading comprehension (40%) 共四篇，其中一篇来自教材，占10%； Passage 6 1. 1) Yes, it is. 2) Once the technology had evolved, it became possible. It is just a matter of time. 3) The faster you go, the slower time seems to move for you with respect to everyone else. This concept is known as “time dilation.” 4) travel at the speed of light; 5) If your speed finally reaches the speed of light then time actually stands still, exceed the speed of light and its thought that time will start to flow backward. 6) An effect of Relativity is that the faster you go, the heavier you become and as you reach the speed of light, you become infinitely heavy. 7) The technique is called “quantum tunneling”. It is used by electrons orbiting around atoms to instantly move from point A to point B without passing through the space between. 8)It is actually only technology stopping us from doing it. 2. 1) 即使如我面前的杯子这么普通的东西也可以说某种程度上掌握了时间旅行。它在桌子上放着，看似无所事事，然而实际上正在穿越时空，无情地，它的速度是每天走一天。 2）如果我跑到这咖啡店的速度接近光速，当我坐下来时，我的年龄小于我周围的人。实际上，我已经走到他们的未来。 3) 剩下的就是当宇宙倒退时，以这个速度飞行，在适当的时候减速，然后在1973年7月突然出现，那是有史以来最伟大的时刻——我出生啦。 Passage 7 1. 1)By altering the function of one gene, the life span of a species of roundworm could be
考研英语阅读 （1） To paraphrase 18th-century statesman Edmund Burke, "all that is needed for the triumph of a misguided cause is that good people do nothing." One such cause now seeks to end biomedical research because of the theory that animals have rights ruling out their use in research. Scientists need to respond forcefully to animal rights advocates, whose arguments are confusing the public and thereby threatening advances in health knowledge and care. Leaders of the animal rights movement target biomedical research because it depends on public funding, and few people understand the process of health care research. Hearing allegations of cruelty to animals in research settings, many are perplexed that anyone would deliberately harm an animal. For example, a grandmotherly woman staffing an animal rights booth at a recent street fair was distributing a brochure that encouraged readers not to use anything that comes from or is tested in animals-no meat, no fur, no medicines. Asked if she opposed immunizations, she wanted to know if vaccines come from animal research. When assured that they do, she replied, "Then I would have to say yes." Asked what will happen when epidemics return, she said, "Don't worry, scientists will find some way of using computers." Such well-meaning people just don't understand. Scientists must communicate their message to the public in a compassionate, understandable way-in human terms, not in the language of molecular biology. We need to make clear the connection between animal research and a grandmother's hip replacement, a father's bypass operation a baby's vaccinations, and even a pet's shots. To those who are unaware that animal research was needed to produce these treatments, as well as new treatments and vaccines, animal research seems wasteful at best and cruel at worst. Much can be done. Scientists could "adopt" middle school classes and present their own research. They should be quick to respond to letters to the editor, lest animal rights misinformation go unchallenged and acquire a deceptive appearance of truth. Research institutions could be opened to tours, to show that laboratory animals receive humane care. Finally, because the ultimate stakeholders are patients, the health research community should actively recruit to its cause not only well-known personalities such as Stephen Cooper, who has made courageous statements about the value of animal research, but all who receive medical treatment. If good people do nothing there is a real possibility that an uninformed citizenry will extinguish the precious embers of medical progress. 18世纪政治家埃德蒙·柏克曾说过类似这样的话，“被误导的运动要想成功，所需的只是好人不作为。”现在，就有这样一个运动正在寻求终止生物医学的研究，因为有这样一种理论说，动物享有权利禁止它们被用于实验。科学家应该对动物权利鼓吹者做出强有力的
Why We're Fat 1 So why is obesity happening? The obvious, clichéd-but-true answer is that we eat too much high-calorie food and don't burn it off with enough exercise. If only we had more willpower, the problem would go away. But it isn't that easy. 为什么会有肥胖症？一个明显、老生常谈但又真实的答案就是我们吃太多高热量食物并且没有进行足够的运动消耗它。要是我们的意志力更强大，这个问题便迎刃而解了。但是，问题并不是那么简单。 2 When warned about the dangers of overeating, we get briefly spooked and try to do better. Then we're offered a plateful of pancakes smothered in maple syrup, our appetite overpowers our reason, and before we know it, we're at it again. Just why is appetite such a powerful driver of behavior, and, more important, how can we tame it? 当我们被警告说吃得太多的时候，一时总会被吓倒并努力做好一些。然后一碟涂满槭糖浆的煎饼摆在面前，我们的食欲战胜了我们的理智，等到我们意识到它的时候，我们又重蹈覆辙了。到底为什么食欲具有如此强大的推动力？更重要的是，我们怎么才能够控制它？ 3 Within the past few years, science has linked our ravenous appetites to genes and hormones. Among the hormones that fuel these urges are ghrelin and leptin, known as the "hunger hormones." Ghrelin is produced mostly by cells in the stomach lining. Its job is to make you feel hungry by affecting the hypothalamus, which governs metabolism. Ghrelin levels rise in dieters who lose weight and then try to keep it off. It's almost as if their bodies are trying to regain the lost fat. This is one reason why it's hard to lose weight and maintain the loss. 近几年来，科学将我们迫不及待要吃的食欲跟基因和激素联系起来。激起这些强烈的欲望的激素有胃促生长素和消瘦素，也被称作“饥饿激素”。胃促生长素主要由胃保护层的细胞产生。它的职责是影响控制新陈代谢的下丘脑，让你感到饥饿。当节食者减肥并且努力维持减肥效果，他的胃促生长素水平就会升高。就像他们的身体要试图恢复失去的脂肪。这是为什么很难减肥并维持减肥效果的原因之一。 4 Leptin turns your appetite off and is made by fat cells. Low leptin levels increase your appetite and signal your body to store more fat. High leptin levels relay the opposite signal. Many obese people have developed a resistance to the appetite-suppressing effects of leptin and never feel satisfied, no matter how much they eat. Basically, your body uses these hormones to help you stay at your weight and keep you from losing fat —which is another reason why dieting can be so difficult. 消瘦素消除你的食欲，它来自脂肪细胞。低消瘦素水平增加你的食欲并通知你的身体储存更多的脂肪。高消瘦素水平传递相反的信号。很多肥胖的人已经形成了一种对消瘦素抑制食欲效应的抵抗，不管他们吃多少也从不感到满足。从根本上说，你的身体利用这些激素帮助你保持现在的体重，不让你的脂肪流走——这是节食如此之难的另外一个原因。
第一单元环境 大规模研究发现：地球的“健康”每况愈下有史以来对地球进行的最大规模的科学分析表明，地球上的许多生态系统都达不到标准。 由联合国主持的《千年生态系统评估综合报告》指出，由于不可持续的使用，地球上将近三分之二的用来维持生命的生态系统已经遭到破坏，其中包括干净的水源、纯净的空气，以及稳定的气候。 以上大部分的破坏都是人类在过去的半个世纪里造成的。据报告分析，随着人类对食物、淡水、木材、纤维以及燃料等资源的需求日趋激增，环境发生了极大的变化，引发了诸如滥伐森林、化学污染等问题。因此，该报告的作者警告说，照此下去，本已岌岌可危的生态环境将会在21世纪的上半叶急剧恶化。 这项历史性的研究由来自世界95个国家的政府部门以及民间组织的1,300多位科学家共同完成。四年来，他们考察了地球上许多生物的生长环境、物种以及将他们联系起来的生态体系。联合国环境规划署对该报告进行了编辑整理并于昨天在中国北京公布了研究结果。 在公布该报告的新闻发布会上，联合国秘书长科菲·安南指出：“只有了解环境及其运作过程，我们才能制定出必要的决策加以保护。”他还说，“只有珍惜所有宝贵的自然资源和人类资源，我们才有希望去建设一个可持续发展的未来。” 对社会经济的影响 该报告对自然界的大部分生物多样性持悲观态度，地球上可能有10%—30%的哺乳动物，鸟类以及两栖动物濒临灭绝。 这次大规模生态调查是根据安南的《千年发展目标》展开的，该发展目标是由联合国发起的，旨在2015年之前大幅度缓解饥饿与极度贫困等社会经济问题。 总部位于内罗毕的联合国环境规划署执行主席克劳斯·托普弗说：“从某些方面来说，《千年生态系统评估综合报告》让我们首次认识到生态系统服务功能的经济价值，并使我们对尊重和保护地球生命维护系统有了新的见解。” 目前由于人类社会对地球环境的开发利用，食物供应不断增加，然而增长的速度仍然太慢，难以完成联合国制定的在2015年前消除全球一半饥饿的目标。 报告还说，过度使用生态系统的负面影响还包括渔业的衰退，含有大量沉积物的河口周围近海“死亡区”的出现，水质的变化以及不可预测的区域性气候等。 此外，森林的滥伐和其他生态系统的巨大改变也加剧了诸如疟疾、霍乱等疾病的传播，并使已有传染病分化出新的类别。 根据该报告，水资源体系的变化会增加毁灭性洪灾的爆发频率和程度。在20世纪90年代，洪灾造成的死亡人数超过10万，损失约2,430亿美元。
Unit 1 general description of literature reading and translation 1.Definition of Literature Literature is a general term for professional writings in the form of books, papers, and other documentations. As an important means for preserving knowledge, literatures have become precious resources or treasures for the mankind, which have greatly contributed to the social progress of the human race. 2.Classification of Literature 1) Textbooks（课本） a kind of professional writing（一种专业的写作） 2) Monographs（专著） various viewpoints and discussions 3) Papers（论文） the theoretical analysis and experimental description title, author, affiliation, abstract, keywords, introduction, theoretical analysis and/or experimental description, results and discussion or conclusion, acknowledgments, references 4) Encyclopedias(百科全书) every branch of knowledge 5) Periodicals （期刊） a series of publications 6)Special Documentation（特殊文档） all the printed materials 3.Linguistic Features of Scientific Literature stylistically (文体上) scientific literature is a kind of form writing; syntactically（结构上）scientific literature has rigorous grammatical structures and in most cases is rather unitary; Morphologically（语法上）scientific literaure is featured by high specialization,the use of technical terms and jargons ,unambiguous implication and the fixed sense of the word Principles or Criteria of Translation Whenever principles or criteria of translation are under discussion in China, Yan Fu’s three- character guide”-----xin, da, ya, namely, faithfulness (信), expressiveness (达), and elegance (雅). These three principle has always been regarded as a plumb-line for measuring the professional level of translation and a goal for translators to strive after. However, in the application of this principle, people come to find some unsatisfactory aspects of the three-character guide and have put foreword a variety of new standards or criteria of translation. Despite a variety of opinions, two criteria are almost unanimously accepted by all, namely, the criterion of faithfulness/accuracy (忠实/准确) and that of smoothness (流畅). We may also take these two criteria as the principle scientific literature translation. By faithful/accuracy, we mean to be faithful not only to the original contents, to the original meaning and views, but also to the original form and style. By smoothness, we mean not only easy and readable rendering, but also idiomatic expression in the target language, free form stiff formula and mechanical copying form dictionaries. Unit 2 professional papers 2.1.Definition of professional papers A professional paper is a typewritten paper in which professionals present their views and research findings on a chosen topic. It is variously known as the “research paper”, “course paper”, “thesis paper” or “library paper”. The task of the author of a paper is essentially the same: to read on a particular topic, gather information about it, and report the findings in it. 2.2.Classification of professional papers
Lesson 1 1. Yesterday’s terrorism darkened, marked and forever altered the way Americans live their lives. 昨日发生的恐怖主义活动使美国人的生活暗淡无光，在他们的生活中留下了印迹，并永远地改变了他们的生活。 2. “We are going to have to learn what a lot of other countries have gone through: to manage fear at a cultural and national level,” said Charles Figley, a professor of trauma psychology at Florida State University. “We’re getting a lesson in the way fear works.” 佛罗里达州立大学创伤心理学教授查尔斯?费格里说:“我们得学一学其它许多国家曾经经历过的东西，那就是从文化上和在全国范围内来应对恐惧。”他还说:“我们正在体验恐惧是怎样起作用的。” 3. In a country long proud and even boastful of its openness—a country where an ordinary citizen can stroll through the U.S. Capitol unescorted—the terrorist attacks are likely to force Americans to a lot of that. Metal detectors now mark the front door of many government buildings, and security guards are a fixture in the lobby of most large office buildings. 美国是一个一向以开放自豪甚至洋洋得意的国家，在这里，人们可以独自在美国国会大楼中闲庭信步，而现在，恐怖袭击很有可能迫使美国人处处小心，惶惶不可终日。其实我们很大程度上已经是这样了。许多政府大楼的前门装设的金属探测器已然成为一道风景线，大部分的办公大楼里也必备保安。 4. But retaliation carries the risk of setting off a tightening spiral of violence and counterviolence not unlike the Middle East or Northern Ireland. Unlike countries that have had to learn to live with violence,”We are new at this,” said Florida’s Dr. Figley, who heads a project that has trained trauma teams in Yugoslavia.”My fear is we will overreach and make things worse rather than better by retribution, revenge, racism and marginalizing ethnic groups.” 报复有很大的危险，会引发和在中东及北爱尔兰一样的紧张的暴力和反暴力的恶性攀升。与那些不得不在暴力中学习如何生存的国家不同，“我们是新手，”曾在南斯拉夫训练过创伤急救队的项目负责人费格里博士说，“我所担心的是惩罚、报复、种族主义和排斥少数民族的举动会过于偏激，适得其反。” 5. Fear of terrorism is likely to lead Americans to tolerate more government surveillance—such as overhead video cameras at sporting events—than they have to date. “It’s very likely in the wake of today’s events that we’re going to see a greater acceptance on the public’s part—and on the court’s part—to approve certain kinds of police tactics,” said William Stuntz, a Harvard Low School professor. 对于恐怖主义的恐惧会使美国人接受比现在更多的来自政府的监控，例如在运动竞赛场上高架的摄象机。哈佛大学法学院教授威廉姆斯?斯汤资说，“经过目前前这些事件，我们将发现，无论是公众，还是法庭，都会在更大程度上接受某些警察的策略。” Lesson 5 戴维先到一步，事后他气愤地向我发难说当他告诉领班准备和谁一起吃饭时，领班的语气骤然逆转。一瞬间就从“这是个什么人？”变成“这边有请，先生。”当我们赶到时，拍照的人已经在饭店外忙个不停了。戴维开始嘲笑我是伦敦这家高级饭店里的知名人物。这时，我俩向屋内望去并同时看到了我们的偶像。
核电与核辐射 1986 年4 月26 日，切尔诺贝利核电站的一个反应堆发生爆炸，将相当于400 颗广岛原子弹的放射性尘降物散布到整个北半球。在此之前，科学家对辐射对植物和野生动物的影响 几乎一无所知。这场灾难创造了一个活生生的实验室，尤其是在这个被称为禁区的1100 平方英里的区域。 1994 年，德州理工大学生物学教授罗纳德·切瑟和罗伯特·贝克是首批获准完全进入该区域的美国科学家之一。“我们抓了一群田鼠，它们看起来和野草一样健康。我们对此非 常着迷。”贝克回忆说。当Baker 和Chesser 对田鼠的DNA 进行测序时，他们没有发现 异常的突变率。他们还注意到狼、猞猁和其他曾经稀有的物种在这片区域游荡，仿佛这里 是原子野生动物保护区。2003 年由一组联合国机构建立的切尔诺贝利论坛发表了声明一份关于灾难20 周年的报告证实了这一观点，称“环境条件对该地区的生物群落产生了积极 影响”，将其转变为“一个独特的生物多样性保护区”。 五年前，贝克和切塞尔在这片区域搜寻田鼠。Mousseau 到切尔诺贝利去数鸟，发现了与之相矛盾的证据。穆萨乌是南卡罗莱纳大学的生物学教授，他的合作者安德斯·佩普·穆 勒现在是巴黎南方大学生态、系统学和进化实验室的研究主任。他们发现该地区家燕的数 量要少得多，而那些存活下来的家燕则遭受着寿命缩短、(雄性)生育能力下降、大脑变小、肿瘤、部分白化病(一种基因突变)以及白内障发病率更高的痛苦。在过去13 年发表的60 多篇论文中，Mousseau 和Moller 指出，暴露在低水平辐射下对该区域的整个生物圈产生 了负面影响，从微生物到哺乳动物，从昆虫到鸟类。 包括贝克在内的批评人士对穆萨和穆勒持批评态度。贝克在2006 年与切塞尔合著的《美国科学家》(American Scientist)文章中指出，该区域“实际上已成为一个保护区”，穆萨和穆勒的“令人难以置信的结论只得到了间接证据的支持”。 我们所知道的关于电离辐射对健康影响的几乎所有信息都来自于一项正在进行的对原子弹幸存者的研究，该研究被称为寿命研究，简称LSS。辐射暴露的安全标准基于LSS。然而，LSS 留下了关于低剂量辐射影响的大问题没有得到解答。大多数科学家都同意，没有所谓 的“安全”辐射剂量，无论剂量有多小。小剂量是我们最不了解的。LSS 并没有告诉我们多 少低于100 毫西弗(mSv)的剂量。例如，引起基因突变需要多少辐射，这些突变是可遗传 的吗?辐射诱发的疾病(如癌症)的机制和遗传生物标记物是什么? 三重危机2011年 3月福岛第一核电站创建另一个生活摩梭实验室和穆勒可以研究低 剂量的辐射,复制他们的切尔诺贝利核事故研究和允许他们“更高的信心,影响我们看到有关辐射,而不是其他因素,“摩梭说。福岛310平方英里的隔离区比切尔诺贝利小，但在其他方面 是一样的。这两个区域都包括被遗弃的农田、森林和城市地区，在这些地区，辐射水平在 短距离内变化数量级。而且几乎可以肯定，他们进入福岛的速度比科学家进入苏联控制的 切尔诺贝利的速度还要快。简而言之，福岛事件提供了一个解决争议的机会。 福岛核事故发生后的几个月里，穆萨乌和莫勒就开始在这座正在冒烟的核电站以西受污染的山林里清点鸟类数量，但他们无法进入这个区域，亲眼看看家燕的情况。最后，在2013 年6 月，穆萨乌是首批获准完全进入福岛禁区的科学家之一。 对辐射的敏感度在生物和同一物种的个体之间有很大的差异，这是重要的原因之一，不要从蝴蝶推断到家燕或从田鼠推断到人类。蝴蝶对辐射特别敏感，Mousseau 说。2012年8 月，在线期刊《科学报告》(Scientific Report)发表了一篇论文，研究福岛核泄漏对淡草蓝 蝶的影响。冲绳县琉球大学的生物学教授大木若二(Joji Otaki)透露，在这种不雅行为发生两个月后，在福岛附近采集的蝴蝶出现了翅膀、腿和眼睛畸形的情况。Mousseau 和Moller 对切尔诺贝利和福岛昆虫的调查显示，蝴蝶作为一个群体数量急剧下降。但御宅族
1.A strange thing happens to nearly everybody at night(英语阅读理解) A strange thing happens to nearly everybody at night. They turn off the lights, pull up the covers and close their eyes. Six or seven sleeping hours later, they wake up again. Strange, isn't it? 一个奇怪的事情发生在几乎每个人身上，并且都在晚上。他们关上灯，拉上了窗帘和闭上他们的眼睛。六或七小时的睡眠后，他们再次醒来。奇怪，不是吗？ Sleep is a great puzzle. Scientists and doctors would like to talk about why one can't fall asleep. They are not so sure what causes sleep. 睡眠是一个伟大的谜。科学家和医生谈谈为什么不能入睡。他们不知道什么是睡眠的原因。 You will sleep best both when you are in good health and when you don't eat too much or too little. No worries and a comfortable place to sleep are important, too.你会睡得最好当你身体健康时，你不要吃太多或太少。不用担心，一个舒适的睡眠环境是重要的。 Strange things happen during sleep. For example, you often move. You would feel tired ever if you didn't move. You also dream. Part of your brain is still awake when you dream. Dreaming happens when the memory and imagination parts of your brain are still awake. 奇怪的事情发生在睡眠期间。例如，你经常搬家。你会觉得累，如果你没有动。你也做梦。你大脑的一部分仍然是清醒的时候，您也做梦。做梦时发生的记忆和想象的部分你的大脑仍然清醒。 Don't worry if you dream. Some great stories and poems were finished while the writers were dreaming. 别担心，如果你有梦想。一些伟大的故事和诗歌的作家会完成梦想。 根据短文内容,判断下列句子正(T)、误( F) 。 1. A strange thing happens to only someone at night.T 2. Scientists and doctors are both sure what causes people's sleep.F 3. When you are in good health, you can sleep very well at night.T 4. The writer means that some dreams are good for people.T 5. If you eat too much or too little before sleep, you won't sleep well.T 2. At the Barber's Shop 在理发店 Jack went to a barber's shop and had his hair cut, but when he came out, he 杰克去一家理发店剪了头发，但是当他出来时，他 was not happy with the result. When his friend Bob saw him, he laughed 是不满意的结果。当他的朋友鲍波看到他时，他笑了 and said, "What has happened to your hair,Jack?" 说，“你的头发怎么了，杰克？” Jack said, "I tried a new barber's shop today, because I wasn't quite satisfied 杰克说，“我今天尝试了新的理发店，因为我不是很满意 with my old one, but this one seems even worse." 旧的，但是这一次似乎更差。” Bob agreed. "Yes, I think you're right, Jack. Now I'll tell you what 他同意了。”是的，我想你是对的，杰克。现在我要告诉你 to do when you go into a barber's shop next time: look at all the barber's hair, 做的时候，你走进一家理发店下时间：看所有理发师的头发， find out whose hair looks worst, and then go straight to him."