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
Graphene’s Superstrength Big technology comes in tiny packages. New cell phones and personal computers get smaller every year
Graphene’s Superstrength Big technology comes in tiny packages. New cell phones and personal computers get smaller every year
admin
2012-12-06
90
问题
Graphene’s Superstrength
Big technology comes in tiny packages. New cell phones and personal computers get smaller every year, which means these electronics require even smaller components on the inside. Engineers are looking for creative ways to build these components, and they’ve turned their eyes to graphene, a superthin material, made of carbon, that could change the future of electronics.
This year’s Nobel Prize for Physics has been awarded to Andre Geim and Kostya Novoselov from the University of Manchester, UK. for the discovery of graphene. Graphene isn’t just small, it’s "the thinnest possible material in this world." says Novoselov. He calls it a "wonder material." It’s so thin that you would need to stack about 25,000 sheets just to make a pile as thick as a piece of ordinary white paper. If you were to hold a sheet of graphene in your fingers, you’d have no idea because you wouldn’t be able to see it.
Carbon is one of the most abundant elements in the universe. Every known kind of life contains carbon. Graphene is a sheet of carbon, but only one atom thick. You don’t have to look far to find graphene—it’s all around you.
If you want this high-tech wonderstuff, all you need is a pencil, paper and a little adhesive tape. Use the pencil to shade a small area on the paper, and then apply a small piece of adhesive tape over the area. When you pull up the tape, you’11 see that it pulls up a thin layer of some of the shading from your pencil. That layer is called graphite, one of the softest minerals in the world.
Now stick the same piece of tape on another sheet of paper and pull the tape up—there should be an even thinner layer, this time left on the paper. Now imagine that you do this over and over, until you get the thinnest possible layer of material on the paper. This layer would be only one atom thick, and you wouldn’t be able to see it. Graphite is made of layers of graphene. So when you get to the thinnest possible layer, you’ve found graphene.
The word “apply” in paragraph 4 could be used to replaced by ?
选项
A、push.
B、find.
C、collect.
D、put.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/yLQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
TryingtoFindaPartnerOneofthemoststrikingfindingsofarecentpollintheUKisthatofthepeopleinterviewed,one
Canadalkea:WhataGreatPlaceforYoutoShopTherearemanydifferentstoresthatpeoplegotoinordertobuyvarioushou
MusicalChairsDoyouknowhowtoplayagamecalled"MusicalChairs"?Itiseasytoplayandmostpeopleenjoyit.Allyou
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
TryingtoFindaPartnerOneofthemoststrikingfindingsofarecentpollintheUKisthatofthepeopleinterviewed,one
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
Astrictvegetarianisapersonwhoneverinhislifeeatsanythingderivedfromanimals.Themainobjectiontovegetarianismon
ThirstforOilWorldwideeveryday,wedevourtheenergyequivalentofabout200millionbarrelsofOil.Mostoftheenergy
ArtificialSpeechBecausespeechisthemostconvenientformofcommunication,inthefuturewewantessentiallynaturalcon
随机试题
足月新生儿,生后3天,因胎膜早破26小时剖宫产娩出,出生体重2400g,出生无窒息。生后2天吃奶差,呕吐,面色发绀,皮肤、巩膜黄染。查体:体温不升,反应差,前囟平,心率150次/分,双肺无明显异常,腹部稍胀,肝肋下3em,四肢肌张力低。白细胞21×109
_______通过研究,将人的需要按其出现的先后顺序及强弱分为高低不同的七个层次。
对于气源为城市高、中压输配管道的压缩加气站来说,其进站天然气管道上应设置的阀门为()。
在专家判断法中,“5C"要素分析法的5C是指()
银行从业人员的下列行为中,属于“反洗钱”规定的有()。
L公司是一家知名广告设计公司,每年都为广告设计专业的应届毕业生提供实习机会。这些毕业生在实习期间会参与不同的产品设计团队的工作,了解不同产品的广告设计流程,并承担一些基础性的工作。实习期结束后,各团队的管理者会给这些学生按照不同的项目进行评分,邀请其中的优
有如下程序:#includeusingnamespacestd;intmain(){intf,fl=0,12=1;for(inti=3;i<=6;i++){f=f1+t2:
Itoldthedriverthathehadknockedtwopeople______theirbicyclesandhadnearlycausedahadaccident.
"Youareveryselfish.It’shightimeyouwillrealizethatyouarenotthemostimportantpersonintheworld,"Edgarsaidtoh
DearDigitalDiary—LifeloggingintheInternetAgeFromsleepingandeatingtoexerciseandtravel,technologynowallowsus
最新回复
(
0
)