Question

6．Harvard researchers have created a tough，low-cost，biodegradable （可生物降解的） material inspired by insects'hard outer shells．The material's inventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic．The material，made from shrimp （'虾） shells and proteins produced from silk，is called"shrilk．"It is thin，clear，flexible and strong．
A major benefit of the material is its biodegradability．Plastic's toughness and flexibility represented a revolution in materials science during the 1950s and'60s．Decades later，however，plastic's very durability （耐用性） is raising questions about how appropriate it is for one-time products such as plastic bags，or short-lived consumer goods，used in the home for a few years and then cast into a landfill where they will degrade for centuries．What is the point of making something that lasts 1，000years？
Shrilk not only will degrade in a landfill，but its basic components are used as fertilizer（肥料），and so will enrich the soil．
Shrilk has great potential，the inventors said．Materials from which it is made are plentiful in nature，found in everything ranging from shrimp shells，insect bodies to living plants．That makes shrilk low cost，and its mass production possible should it be used for products demanding a lot of material．
Work on shrilk is continuing in the lab．The inventors said the material becomes flexible when wet，so they're exploring ways to use it in wet environments．They're also developing simpler production processes，which could be used for non-medical products，like for computer cases and other products inside the home．They're even exploring combining it with other materials，like carbon fibers，to give it new properties．

66．Paragraph I of the passage is mainly about shritk'sC．
A．remarkable design
B．interesting name
C．major features
D．basic elements
67．What has become a concern about plastic？A
A．Using it properly．
B．Producing it cheaply．
C．Developing its properties quickly．
D．Evaluating its contributions fairly．
68．According to the inventors，shrilk has great potential partly becauseD．
A．it can help plastic degrade
B．it can be found in living things
C．its mass production has been realized
D．its raw materials are abundant in mature
69．What are the inventors doing in the lab？B
A．Replacing carbon fibers with shrilk．
B．Testing ahrilk's use in wet conditions．
C．Making shrilk out of used household goods．
D．Improving shrilk's flexibility for medical purposes．
70．Which of the following can be the best title for the passage？D
A．Recent Progress in Environmental Protection
B．Benefits of Insects in Scientific Research
C．The Harm of One-time Products
D．A Possible Alternative to Plastic．

Answer 1

分析 本文是一篇说明文，事物类说明，讲述的主题是"shrink"，哈佛的研究人员仿照昆虫外壳研制出了一种既坚硬又廉价的物质．这种物质由虾壳和蚕丝提取物制作而成，可降解，非常环保．

解答 66． C   考查细节理解．根据第一段中的"tough，low-cost，biodegradable （可生物降解的）""moreenvironmentally friendly""thin，clear，flexible and strong"，由虾壳和用丝绸生产的蛋白质所做成的"shrilk"很薄、透明、有弹性，而且非常结实，都是"shrilk"的特征．
67． A   考查推理判断．根据第二段的第三句"Decades later，however，plastic's very durability （耐用性） is raising questions about how appropriate it is for one-timeproducts such as plastic bags，or short-lived consumergoods，used in the home for a few years and then castinto a landfill where they will degrade for centuries"主要讲塑料的耐用性而向我们提出了它的使用问题，可推知，如何恰当地使用塑料是个令人忧虑的问题．
68． D   考查细节理解．根据第四段中的"Materialsfrom which it is made are plentiful in nature"可知，生产Shrilk的材料大自然中非常丰富和答案D项"它的原材料在大自然中非常丰富"一致，即"plentiful"与D项的"abundant"是同义词，故选D．
69． B   考查细节理解．根据最后一段的前两句"Work on shrilk is continuing in the lab．Theinventors said the material becomes flexible when wet，sothey're exploring ways to use it in wet environments．"可知，这种材料在潮湿的情况下会变得易弯曲，发明者正在探索在潮湿的环境中使用它的方法，故选B．
70．D   考查标题概括．文章的第一段开篇点题，主要介绍一种新型材料，一种可能的塑料替代物，这种材料有望替代难降解的塑料．故选D项．

点评 解答细节理解题时，一个常用的方法就是运用定位法，即根据题干和选项中的关键词从原文中找到相关的句子，与选项进行比较从而确定答案；推理判断题既要求学生透过文章表面文字信息推测文章隐含意思，又要求学生对作者的态度、意图及文章细节的发展作正确的推理判断，力求从作者的角度去考虑，不要固守自己的看法或观点．