大学英语6级模拟周周测

章节摘录

　　Although rates of population increase are now much slower in the developed world than in the developing countries， in fact， because larger amounts of resources per person are used in developed nations， each individual from the developed world has a much greater environmental impact than does a person from a developing country. Conversation strategies that would not significantly alter lifestyles but that would greatly lessen environmental impact are essential in the developed world.　　In the developing world， meanwhile， the most important factors necessary to lower population growth rates are democracy and social justice. Studies show that population growth rates have increased and women receive economic status equal to that of men enabling women to hold jobs and own property. In addition， birth control information in these areas is more widely available， and women are free to make their own reproductive decisions.　　B. Global Warming　　Like the glass panes in a greenhouse， certain gases in the Earths atmosphere permit the Suns radiation to heat Earth. At the same time， these gases retard the escape into space of the infrared energy radiated back out by Earth. This process is referred to as the greenhouse effect. These gases， primarily carbon dioxide， methane， nitrous oxide， and water vapor， insulate Earths surface， helping to maintain warm temperatures. Without these gases， Earth would be a frozen planet with an average temperature of about 8"C instead of a comfortable 150C. If the concentration of these gases rises， they trap more heat within the atmosphere， causing worldwide temperatures to rise.　　Within the last century， the amount of carbon dioxide in the atmosphere has increased dramatically， largely because people burn vast amounts of fossil fuels——coal and petroleum and its derivatives. Average global temperature also has increased——by about 0. 6 Celsius degree within the past century. Atmosphere scientists have found that unless dramatic action is taken， global temperature will continue to rise by 1.4 to 5.8 Celsius degrees over the next century. Although such an increase may not seem like a great difference， during the last ice age the global temperature was only 2.2 Celsius degrees cooler than it is presently.　　The consequences of such a modest increase in temperature may be devastating. Already scientists have detected a 40 percent reduction in the average thickness of Arctic ice. Other problems that may develop include a rise in sea levels that will completely inundate a number of low-lying island nations and flood many coastal cities， such as New York and Miami. Many plant and animal species will probably be driven into extinction， agriculture will be severely disrupted in many regions， and the frequency of severe hurricanes and droughts will likely increase.　　C. Depletion of the Ozone Layer　　The ozone layer， a thin band in the stratosphere（layer of the upper atmosphere）， serves to shield Earth from the Suns harmful ultraviolet rays. In the 1970s， scientists discovered that chlorofluorocarbons （CFCs）——chemicals used in refrigeration， air-conditioning systems， cleaning solvents， and aerosol sprays——destroy the ozone layer. CFCs release chlorine into the atmosphere； chlorine， in turn， breaks clown Ozone molecules. Because chlorine is not affected by its interaction with ozone， each chlorine molecule has the ability to destroy a large amount of ozone for an extended period of time.

前言

　　从大学英语四级考试到六级考试，题目的难度和深度均有很大提高。为了帮助广大考生应对新型的六级考试，本书应运而生。本书的编写严格按照最新《大学英语六级考试大纲》的要求，力求在各方面与大学英语六级考试样卷及真题保持一致。模拟试题的选材均出自国内外的最新文章，考生可以在平时的训练中培养英语语感；对答案的分析透彻到位，帮助考生全面熟悉六级考试新题型，实现考前快速突破。　　本书特点归纳如下：　　1.本书题目所选材料的难易程度、内容和题材参照历年真题和最新样卷的标准，力求为考生创造一个全真的考试氛围。听力和阅读材料题材多样，考生可以通过这些文章扩大自己各领域的知识和词汇，并积累相关的文化背景知识。事实证明，一定的文化背景对于解题是非常必要的。　　2.本书提供了八套模拟题，供考生在考前两个月进行冲刺训练。模拟题的数量不在于多t而在于精。试题解析主次分明，重点介绍解题技巧，帮助考生拓展自己的解题思路，达到举一反三的效果。　　3.很多考生对于作文有恐惧感。本模拟题提供的八个作文题目，涉及议论文、图表作文及应用文等，并附有范文，考生可以以范文为蓝本，替换其中的句子，练习用自己的语言表达，最后实现独立完成一篇文章。　　4.每套模拟题的答案解析前都有对考试中一种题型的介绍，并提供解题步骤和技巧。考生可以先反复揣摩不同题型的解题方法，然后在做题时有意识地进行操练，这样才能起到事半功倍的效果。　　建议考生使用每套试题应按照考试规定的时间即在两个小时内完成。在做题的过程中，养成良好的答题习惯，逐步提高答题速度。做完之后对照参考答案和解析了解自己的强项和弱项，并对自己的弱项进行加强训练。建议可以一周做一套题目，在对这套题目进行总结提高后再做第二套。有的放矢地掌握英语学习的途径和方法，通过六级考试将不再是一道难题。　　简言之，本书既有理论基础的介绍，也有仿真训练和详细剖析，是对考生听、读、写、译的能力的综合测试。只有通过练习，才能将理论运用于实践，使之有感性的认识。　　当然，因时间仓促及水平有限，不妥之处在所难免，恳请读者批评指正。

内容概要

　　赵晓红，上海交通大学外国语学院副教授，教研部主任。毕业于上海交通大学语言学与应用语言学专业，长期从事研究生公共英语及大学英语教学。曾获国家级教学成果二等奖，上海市教学成果一等奖，上海交通大学教学成果二等奖。主要研究方向为应用语言学——大学英语教学，在课程建设、教学模式改革、考试改革、教材编写方面有丰富经验和成绩。主编和参编教材有：《高校英语选修课系列教材》、《新视角研究生英语》、《工程硕士研究生英语综合教程》、《新视野大学英语泛读》等。

书籍目录

前言丛书总序全国大学英语六级考试答题卡Model Test 1Model Test 2Model Test 3Model Test 4Model Test 5Model Test 6Model Test 7Model Test 8参考答案与解析（见光盘）

编辑推荐

　　名师名校，打造精品书；精讲精练，架设考试桥。　　资深教师执笔，把握考试趋势　　每套试卷独立装订，创造全真考试氛围　　详尽答题解析，尽在超值光盘　　在英国剑桥大学。有一座造型优美的石桥，因为学生在参加考试时要经过该桥，久而久之，这座桥就被称为“考试桥”。本丛书命名为“考试桥”，即是取自这一典故，这里可以理解为“通向考试成功的桥梁”，也可理解为“通过考试这一桥梁。达到拓宽知识、了解世界的目的”。　　考试桥丛书　　最新大学英语教学和考试改革在强调学习者知识掌握的同时。更加注重应试者的语言应用能力，从而实现语言的真正“习得”与把握。鉴于此，上海交通大学出版社重磅出击，精心设计，全方位、系统地打造“大学英语考试桥”系列。针对不同程度的读者。“考试桥”分为三个子系列，每个系列定位清晰，各有侧重，每位读者都可以在此找到适合自己实际需要的系列。　　考前冲刺热身系列　　全真模拟训练，快速进入备考状态　　模拟题采用全真形式。意在营造考试氛围，使读者熟悉考试形式。　　点击真题考点，实时关注考试动向　　跟踪历年考试真题，资深教师精析真题考点，使备考更具针对性、预测性。　　优化备考策略，应对考试成竹在胸　　一线教师精心编写，在为读者夯实语言基础的同时，提供应试策略，使备考事半功倍。

作者简介

《大学英语6级模拟周周测》为“考试桥丛书”之一，被纳入“考前冲刺热身系列”。《大学英语6级模拟周周测》以试卷的形式提供了8套六级考试的模拟试题，并提供了详尽的解析与考题预测，可供考生备考大学英语6级考试之用。

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