We produce 500 billion of plastic bags in a year worldwide and they are thrown a

题文

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 faster than 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 plastic powder 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 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.小题1:Daniel Burd won first prize at the Canada Wide Science Fair becau  .A．he found a new kind of microorganismB．he contributed much to environmental protectionC．he found a way to degrade plastics in shorter timeD．he could encourage microbe growth in an easier way小题2: Daniel Burd expod one plastic sample to dead bacteria to  .A．make the live bacteria work betterB．test how effective his method wasC．know which bacteria worked fasterD．control the temperature in the process小题3:Maintaining the required temperature takes little energy becau   .A．plastics can get hot easilyB．microbes can produce heat themlvesC．much carbon dioxide is producedD．the temperature can be controlled小题4: Daniel Burd got his idea from   .A．his school textbookB．the failure of rearchersC．his everyday workD．the practice of other people 题型：未知难度：其他题型

答案

小题1:C小题1:B小题1:B小题1:C

解析

略

考点

据考高分专家说，试题“We produce 500 billi.....”主要考查你对 [日常生活类阅读 ]考点的理解。 日常生活类阅读

日常生活类阅读的概念：

日常生活这一话题主要涉及人们衣食住行等方面的活动。这一话题的选材主要针对人们日常的工作，生活以及学习情况。做这一类题时，最主要的是要把握好人物的活动内容，时间和地点。

日常生活类阅读题答题技巧：

【题型说明】该类文章内容涉及到人们的言谈举止、生活习惯、饮食起居、服饰仪表、恋爱婚姻、消遣娱乐、节日起源、家庭生活等。文章篇幅短小，追根溯源，探索各项风俗的历史渊源，内容有趣。命题也以送分题为主，如事实细节题、语义转换题、词义猜测题和简单推理判断题等。虽然这类文章读起来感觉轻松，试题做起来比较顺手，但绝不能掉以轻心。因为稍不留神，就会丢分。 【备考提醒】为了保证较高准确率，建议同学们做好以下几点： 1、保持正常的考试心态。笔者在教学中发现，越是容易的试题，同学们越是容易失分。为什么呢？因为在这种情况下，同学们极易产生麻痹思想，认为题目好做，就不引起高度重视，于是思维不发散、不周密。而命题人就是利用同学们的这一弱点，设计陷阱题。所以，无论试题难易与否，我们都要保持正常的考试心态。试题容易，不欣喜；试题难，不悲观。 2、根据前面讲到的方法，认认真真、细细心心做好事实细节题。 3、做好语义转换题。这类题是根据英语中一词多义和某些词语在文中能表达一定的修辞意义的原则而设计的。要求同学们解释某生词的含义，确定多义词或短语在文中的意思，确认文中的某个代词所指代的对象，或者对英语中特有的表达、格言、谚语进行解释。这种题要求同学们一定要根据上下文猜测词义或理解句子，切不可望文生义。 4、做好简单推理判断题。简单推理判断题要以表面文字为前提，以具体事实为依据进行推理，做出判断。这种推理方式比较直接，只要弄清事实，即可结合常识推断出合理的结论。