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 （'蝦） 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 本文是一篇說明文，事物類說明，講述的主題是"shrink"，哈佛的研究人員仿照昆蟲外殼研制出了一種既堅硬又廉價的物質．這種物質由蝦殼和蠶絲提取物制作而成，可降解，非常環(huán)保．

解答 66． C   考查細節(jié)理解．根據(jù)第一段中的"tough，low-cost，biodegradable （可生物降解的）""moreenvironmentally friendly""thin，clear，flexible and strong"，由蝦殼和用絲綢生產(chǎn)的蛋白質所做成的"shrilk"很薄、透明、有彈性，而且非常結實，都是"shrilk"的特征．
67． A   考查推理判斷．根據(jù)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"主要講塑料的耐用性而向我們提出了它的使用問題，可推知，如何恰當?shù)厥褂盟芰鲜莻�令人憂慮的問題．
68． D   考查細節(jié)理解．根據(jù)第四段中的"Materialsfrom which it is made are plentiful in nature"可知，生產(chǎn)Shrilk的材料大自然中非常豐富和答案D項"它的原材料在大自然中非常豐富"一致，即"plentiful"與D項的"abundant"是同義詞，故選D．
69． B   考查細節(jié)理解．根據(jù)最后一段的前兩句"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，這種材料在潮濕的情況下會變得易彎曲，發(fā)明者正在探索在潮濕的環(huán)境中使用它的方法，故選B．
70．D   考查標題概括．文章的第一段開篇點題，主要介紹一種新型材料，一種可能的塑料替代物，這種材料有望替代難降解的塑料．故選D項．

點評 解答細節(jié)理解題時，一個常用的方法就是運用定位法，即根據(jù)題干和選項中的關鍵詞從原文中找到相關的句子，與選項進行比較從而確定答案；推理判斷題既要求學生透過文章表面文字信息推測文章隱含意思，又要求學生對作者的態(tài)度、意圖及文章細節(jié)的發(fā)展作正確的推理判斷，力求從作者的角度去考慮，不要固守自己的看法或觀點．