阅读理解。 We produce 500 billion of plastic bags in a year worldwide and t

题文

阅读理解。 We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans, killing wildlife and getting dumped in landfills where they take up to 1,000 years to decompo. Rearchers have been unsuccessfully looking for a solution. The 16-year-old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute, has discovered a way to make plastic bags degrade (降解) in as few as 3 months. a finding that won him first prize at the Canada-Wide Science Fair, a $ 10,000 prize, a $ 20,000 scholarship, and a chance to revolutionize a major environmental issue. Burd's strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms (微生物). If tho microorganisms could be identified, we could put them to work eating the plastic much fasterthan under normal conditions. With this goal in mind, he grounded plastic bags into a powder and concocted (调制) a solution of houhold chemicals, yeast (酵母) and tap water to encourage microbes growth. Then he added the plasticpowder and let the microbes work their magic for 3 months. Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control. Sure enough, the plastic expod (暴露) to the live bacteria was 17% lighter than the control after six weeks. The inputs are cheap, maintaining the required temperature takes little energy becau microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide. "Almost every week I have to do chores and when I open the clot door, I have piles of plastic bags falling on top of me. One day, I got tired of it and I wanted to know what other people are doing with the plastic bags. The answer: not much. So I decided to do something mylf." said Daniel Burd. 1. Daniel Burd won first prize at the Canada-Wide Science Fair becau ____. A. he found a new kind of microorganism B. he contributed much to environmental protection C. he found a way to degrade plastics in shorter time D. he could encourage microbes growth in an easier way 2. Daniel Burd expod one plastic sample to dead bacteria to ____. A. make the live bacteria work better B. test how effective his method was C. know which bacteria worked faster D. control the temperature in the process 3. Maintaining the required temperature takes little energy becau ____. A. plastics can get hot easily B. microbes can produce heat themlves C. much carbon dioxide is produced D. the temperature can be controlled 4. Daniel Burd got his idea from ____. A. his school textbook B. the failure of rearchers C. his everyday work D. the practice of other people 题型：未知难度：其他题型

答案

1-4: C B B C

解析

该题暂无解析

考点

据考高分专家说，试题“阅读理解。 We p.....”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。