Air pollution is a leading cau of cancer and classified among Group 1,or top,

题文

Air pollution is a leading cau of cancer and classified among Group 1,or top, human carcinogens (致癌物质), said the International Agency for Rearch on Cancer (IARC), which is the World Health Organization's (WHO) cancer agency, on Oct 17,2013.The most widely ud system for classifying carcinogens comes from the IARC, which places them into five groups. Group 1 carcinogens definitely cau cancer in humans. Group 2A is probably carcinogenic to humans, Group 2B is possibly carcinogenic, the carcinogenicity of Group 3 in humans is unclassifiable, and Group 4 is probably not carcinogenic to humans. only a little more than 100 are classified as Group 1 cancer-causing substances, including ultraviolet radiation and tobacco smoke.“Our task was to evaluate the air everyone breathes rather than focus on specific air pollutants,” the lARC's Dana Loomis said in a statement. “The results from the reviewed studies point in the same direction: the risk of developing lung cancer is significantly incread in people expod to air pollution.”In 2010, lung cancer resulting from air pollution killed 223,000 people worldwide, and there was also convincing evidence that it increas the risk of bladder (膀腕) cancer, according to the IARC.Air pollution is already known to rai risks for a wide range of illness, including respiratory and heart dias.Air pollution is global, although the levels of it vary over space and time.Loomis said people in Asia, eastern North America, some places in Central America and Mexico, as well as North Africa have relatively high exposure. Developing countries with large populations and booming manufacturing ctors, such as China, are particularly at risk.Many cities in China, such as Beijing, frequently e smog. This week, Harbin, the capital city of Heilongjiang province, became the first Chine city to officially suspend class due to rious smogMany developed countries face similar problems, although to a lesr degree than most developing nations. In Europe, levels of many pollutants have fallen. But between 91 and 96 percent of Europeans living in cities are expod to levels of PM2.5—tiny particles with a diameter of less than 2.5 micrometers—that are higher than the WHO safety limits, says a report published by the European Environment Agency on Oct 15.Although both the composition and levels of air pollution can vary dramatically from one location to the other, the 1ARC said its conclusions apply to all regions of the world.“Given the scale of the exposure affecting people worldwide, this report should nd a strong signal to the international community to take action without further delay,” said Christopher Wild, director of the IARC.小题1:What might be the best title of the passage?A．Signals of air pollutionB．Safety limits of air pollutionC．Air pollution, cancer riskD．Air pollution, smog risk小题2:What’s the main task of IARC?A．To focus on cancer-causing substances.B．To evaluate the air quality.C．To study the developing risk of cancer.D．To nd signals to the international community.小题3:Why should the international community take action without further delay?A．The composition and levels of air pollution vary from place to place.B．More and more people in developing countries are expod to air pollution.C．Developed countries face air pollution, the level of which is higher than the safety limits.D．A large number of people worldwide are expod to air pollution. 题型：未知难度：其他题型

答案

小题1:C小题2:B小题3:D

解析

这篇文章讲的是空气污染会造成癌症的危险，评估空气质量的IARC的数据表明，全世界的人们不同程度的受到空气污染影响，呼吁国际社会应该立刻采取行动。小题1:标题确定题：从文章的内容和第一段的句子;：Air pollution is a leading cau of cancer and classified among Group 1,or top, human carcinogens可知这篇文章讲的是空气污染会造成癌症的危险，选C小题2:细节题：从文章第三段的句子：“Our task was to evaluate the air everyone breathes rather than focus on specific air pollutants,”可知IARC的主要目的是评估空气质量，选B小题3:细节题：从文章最后一段的句子：“Given the scale of the exposure affecting people worldwide, this report should nd a strong signal to the international community to take action without further delay,”可知国际社会应该立刻采取行动，因为全世界很多人暴露于空气污染。选D

考点

据考高分专家说，试题“Air pollution is a l.....”主要考查你对 [健康环保类阅读 ]考点的理解。 健康环保类阅读

健康环保累阅读概念：

健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。

健康环保类文章阅读技巧：

   健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：   第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；   第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；   第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。   从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。【阅读策略】 1、概要(Summarizing)：  阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。 2、组织(Organization)：  阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。