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
Few human records survive for long, the 16 000-year-old Paleolithic cave paintings at Lascaux, France, being one exception. Now
Few human records survive for long, the 16 000-year-old Paleolithic cave paintings at Lascaux, France, being one exception. Now
admin
2012-07-05
64
问题
Few human records survive for long, the 16 000-year-old Paleolithic cave paintings at Lascaux, France, being one exception. Now researchers led by Alex Zettl of the University of California, have devised a method that will, they reckon, let people store information electronically for a billion years.
Dr. Zettl and his colleagues constructed their memory cell by taking a particle of iron just a few billionths of a meter or nanometers (纳米) across and placing it inside a hollow carbon nanotube. They attached electrodes (电极) to either end of the tube. By applying a current, they were able to shuttle the particle back and forth. This provides a mechanism to create the "1" and "0" required for digital representation: if the particle is at one end it counts as a "1", and at the other end it is a "0".
The next challenge was to read this electronic information. The researchers found that when electrons flowed through the tube, they scattered when they came close to the particle. The particle’s position thus altered the nanotube’s electrical resistance on a local scale. Although they were unable to discover exactly how this happens, they were able to use the effect to read the stored information.
What makes the technique so durable is that the particle’s repeated movement does not damage the walls of the tube. That is not only because the lining of the tube is so hard; it is also because friction is almost negligible when working at such small scales.
Theoretical studies suggest that the system should retain information for a long time. To switch spontaneously from a "1" to a "0" would entail (使必要) the particle moving some 200 nanometers along the tube using thermal energy. At room temperature, the odds (几率) of that happening are once in a billion years. In tests, the stored digital information was found to be remarkably stable. Yet the distance between the ends of the tube remains small enough to allow for speedy reading and writing of the memory cell when it is in use. The next challenge will be to create an electronic memory that has millions of cells instead of just one. But if Dr. Zettl succeeds in commercializing this technology, digital decay itself could become a thing of the past.
What is likely to happen when Alex Zettl’s research is successfully commercialized?
选项
A、Human records will be kept for a long time.
B、Digital age will be ended sooner or later.
C、Many companies will be attracted by the technology.
D、The world will be changed greatly.
答案
A
解析
推理判断题。定位句是对Alex Zettl等人的研究的展望,同时也与第一段前后呼应。该句表明,数字丢失将会成为过去的事情,即数据或信息将不会遗失,故A)“人们的记录将会被长期保存”为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/TE57777K
0
大学英语四级
相关试题推荐
Mysuccess____________(从很大程度上来说)shouldbeattributedtomycoworkers.
A、Becausethespeakerwasanartist.B、Becauseshewasalwaysahard-workingstudent.C、Becausetheartist’spaintingsappealto
A、Tomsurvivedtheaccident.B、Tomwaskilledintheaccident.C、SomeonesavedTom’slife.D、ItdidlittledamagetoTom’scar
Holidaysarecelebratedforallsortsofreasons.Somehonorheroes,otherscommemoratereligiousevents,butApril1ststandso
Holidaysarecelebratedforallsortsofreasons.Somehonorheroes,otherscommemoratereligiousevents,butApril1ststandso
A、Creditrecords.B、Applicationfee.C、Physicalexamination.D、Highschooltranscripts.B细节识别。对话中,申请费用这一点是被谈及的。
A、Jacksurvivedtheaccident.B、Jackwastheonlyvictimoftheaccident.C、Jacksavedalltheotherpassengers.D、Itdidlittle
Letushopethat______anuclearwar,thehumanracemightstillsurvive.
A、Jacksurvivedtheaccident.B、Jacksavedalltheotherpassengers.C、Jackhadlittledamagedonetohiscar.D、Jackwastheon
随机试题
最高人民法院拥有()
患者吴某,男,62岁。哮病反复发作,喘息鼻扇,张口抬肩,烦躁,四肢厥冷,脉细数不清,舌质青黯,苔腻或滑。其治疗应首选的方剂是
某公司5年前与一办公楼所有权人签订了租赁合同,租用其中1000m2的面积,约定租赁期限为20年。第一年租金为24万,以后每年租金在上一年的基础上增加1万元,从第8年开始,租金保持固定不变。现市场上类似办公楼的月租金为30元/m2,假设折现率为10%。请计算
按照资金来源不同,投资可分为()。
确定屋面防水卷材采用搭接法铺贴时,其搭接方向和长度与()无关。
关于管理层次与管理幅度之间关系的说法,错误的是()。
在计算企业所得税时,已足额提取折旧的固定资产的改建支出应()。
心理学家()根据著名的双生子爬楼梯实验提出了个体发展的成熟决定论。
Whentelevisionisgood,nothing—notthetheater,notthemagazinesornewspapers—isbetter.Butwhentelevisionisbad,not
A、Onthewhole,thewomanlikedthefilm.B、Thewomandidn’tseethefilm.C、Thefilmwasveryexciting.D、Thefilmwasn’tasgo
最新回复
(
0
)