首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A fledgling firm. EcoLean, in Sweden, has developed a new packaging material. Unlike conventional substance, it takes very littl
A fledgling firm. EcoLean, in Sweden, has developed a new packaging material. Unlike conventional substance, it takes very littl
admin
2013-01-12
34
问题
A fledgling firm. EcoLean, in Sweden, has developed a new packaging material. Unlike conventional substance, it takes very little energy to produce, is made up mostly of a natural material in abundant supply and, when exposed to sunlight, disappears in a matter of hours. It could go a long way toward easing the problems of a litter-strewn world. The brain behind EcoLean is chemist Ake Rosen.
A monument to Rosen’s inspiration can be found in the forecourt of EcoLean s main plant in Helsingborg in southern Sweden. It is a giant egg. Eggshells, it happens, are 95 percent calcium carbonate. And when it comes to eggs, they are a perfect packaging material- though a little too brittle. Rosen, however, found a way to improve on nature’s formula. The other 5 percent of eggshells consists of a crucial "binding agent" that keeps the chalk from turning into dust and toughens the shells. Instead of using the natural protein as a binding agent, Rosen used polylefins(聚烯烃), a type of plastic derived from natural gas. After experimenting with the proportions, Rosen hit upon a Lean Material that consists of up to seventy percent chalk and thirty percent polylefins.
Lean Material looks and feels like conventional plastic, but it isn’t. According to Rosen’s tests, EcoLean asserts that it can be as strong as glass or as pliable as rubber, and it could be a viable, and cheaper, substitute for plastic, cardboard or aluminum packaging. For conservationists, the material has numerous benefits. Even though it consists in part of plastic, which costs energy to produce, polyolefins are pretty low on the eco-hate list. They degrade into carbon and oxygen. Besides, less plastic means using less oil, the essential component in plastic and a nonrenewable resource. Chalk, the main ingredient, is abundant (and cheap) on every continent in the world.
But Lean Material’s most remarkable charm is apparent only when it is ready for the garbage. Bottles, yogurt tubs or candy wrappers made of Lean Material would all he degradable. Leave them sitting on the picnic table and in a month or two sunlight will have reduced them to sand. Or, once in the incinerator the resulting ash will be rich in carbonates, good for making the soil less acidic. As a bonus, the material also has no "memory. "
Stamp
on a Lean Material bottle and it stays crushed, taking up less space in landfill. (399 words)
What is NOT true of Lean Material?
选项
A、It contains a material that is sufficient in supply.
B、It is pliable as rubber, so it can be used as a rubber substitute.
C、It can dissovle into sand after months’ sunlight.
D、It costs little energy to produce.
答案
C
解析
第一段第二句说,该材料在太阳底下几个小时就溶化了,所以不是几个月,故选C。
转载请注明原文地址:https://kaotiyun.com/show/7C9O777K
0
考博英语
相关试题推荐
NicholasChauvin,aFrenchsoldier,airedhisvenerationofNapoleonBonaparteso______andunceasinglythathebecamethelaug
Forgatheringdataaboutindividualsorgroupsatdifferentdevelopmentallevels,researcherscanusetwo.relatedresearchdesi
Thegovernmenthas______aseriesofpoliciestoensureitssustaineddevelopmentineconomy.
Whilethepolltakersaremostwidelyknownfortheirpoliticalsurveys,thegreatestpartoftheirworkisonbehalfofAmerican
Accordingtotheinternationalregulation,theplayingofthenationalanthem______allsportsevents.
Inthelongrunagovernmentwillalwaysencroachuponfreedomtotheextenttowhichithasthepowertodoso.Thisisalmost
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehumans,plantscanhavethei
"Humanism"hasusedtomeantoomanythingstobeaverysatisfactoryterm.57.Nevertheless,andinthelackofabetterword,
______oftheburdenofice,theballoonclimbedupanddriftedtotheSouth.
The____oftwohousesprovedsuchafinancialburdenthattheywereforcedtosellone.
随机试题
若f(x2)=(x>0),则f(x)=()
在人行道等人员来往密集场所安装的落地式灯具,无围栏防护时,安装高度距地面()m以上。
提高工作质量的关键在于()。
下列产品特性属于赋予特性的是()。
小张老师是初中一年级(1)班的新任英语老师,第一次登上初中一年级(1)班的讲台。学生在台下的反应很活跃,让小张很受鼓舞。她决定按原备课计划进行互动,就请了十位同学上讲台抢答表演会话。可是由于不了解学生的情况,被请上讲台的同学学习水平参差不齐,一些同学反应快
依据《电子信息系统机房设计规范》(GB50174-2008),机房内通道的宽度及门的尺寸应满足设备和材料的运输要求,建筑入口至主机房的通道净宽不应小于______。
在三级模式之间引入两层映像,其主要功能之一是()。
Until1983,TillsonLakehadbeenalovelyweekendandvacationplaceformanyfamilies.Theneverythingchanged.DuringtheFou
"Artdoesnotsolveproblems,butmakesusawareoftheirexistence,"sculptorMagdalenaAbakanowiczhassaid.Artseducation,
DavidCameronhasnoticedthathealthandsafetyregulationsstopschoolstakingchildrenoutonfieldtrips,outdooractivitie
最新回复
(
0
)