阅读理解。 An allergy (过敏反应) is a strong reaction to a substance. Many thin

题文

阅读理解。    An allergy (过敏反应) is a strong reaction to a substance. Many things can cau allergies. The most common cau is pollen (花粉), which is usually produced by trees in the spring, grass in the summer and weeds in the fall, as part of their reproductive process.    Other caus include organisms, chemicals, plants and dead skin particles (微粒) from dogs and cats can also cau allergic reactions. So can inct stings and some food.     The most common kind of allergic reactions is itchy (痒的), watery eyes and a blockedor watery no. Allergies can also cau red, itchy skin. Some reactions can be life-threatening, for example, when breathing passages become blocked.     It is not always easy to avoid allergies. Drugs may offer an effective treatment. Another treatment ud in some cas is called immunotherapy (免疫疗法). A patient is injected with small amounts of the allergy-causing substance. The idea is that larger and larger amounts are given over time until the patient develops a resistance in his body.     In the United States, experts estimate that up to 8% of young children have food allergies. Every year the allergies cau about 30,000 cas with vere reactions thatrequire immediate treatment. It can result in breathing trouble and in some cas death.It is said that about 100 to 200 people will die. It says most of the reactions are caudby peanuts and tree nuts like walnuts.     People can also be allergic to medicines. The American Academy of Allergy, Asthma and Immunology says about 10% of bad reactions to commonly ud medicines are allergic. In other words, a person's immune system overreacts and produces an allergic reaction. The most common reactions include skin rashes (皮疹), itching, breathing problems and swellingin areas such as the face. 1. Allergies ldom occur in winter becau _____. [ ]A. plants don't flower in cold weather B. people usually wear thick clothes C. pollen is active below freezing pointD. the weather is not too cold for virus 2. What will happen if one's breathing passages get blocked? [ ]A. It is nothing rious. B. One's life is at risk. C. One has to be nt to hospital. D. One is sure to breathe easily. 3. According to immunotherapy, the patient is suppod to _____. [ ]A. take some medicines to produce antibodiesB. have immediate operations C. be given the allergy-causing substance until he develops a resistance D. be expod to enough allergy-causing substances 4. The best title would be "_____". [ ]A. The ABCs of Allergies B. The Cau of Allergies C. The Treatment of Allergies D. The Prevention of Allergies 题型：未知难度：其他题型

答案

1-4: ABCA

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考点

据考高分专家说，试题“阅读理解。 An a.....”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。