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
考研
Telecommuting, Internet shopping and online meetings may save energy as compared with in-person alternatives, but as the digital
Telecommuting, Internet shopping and online meetings may save energy as compared with in-person alternatives, but as the digital
admin
2018-01-08
57
问题
Telecommuting, Internet shopping and online meetings may save energy as compared with in-person alternatives, but as the digital age moves on,
its green reputation is turning a lot browner
. Last year, E-mailing consumed as much as 1.5 percent of the nation’s electricity—half of which comes from coal.
In 2005 the computers of the world ate up 123 billion kilo-watt hours of energy. As a result, the power bill to run a computer over its lifetime will surpass the cost of buying the machine in the first place—giving Internet and computer companies a business reason to cut energy costs, as well as an environmental one. One of the biggest energy sinks comes not from the computers themselves but from the air-conditioning needed to keep them from overheating. For every kilowatt-hour of energy used for computing in a data center, another kilowatt-hour is required to cool the furnace like racks of servers.
For Internet giant Google, this reality has driven efforts such as the installation of a solar array that can provide 30 percent of the peak power needs of its headquarters as well as increasing purchases of renewable energy. But to deliver Web pages within seconds, the firm must maintain hundreds of thousands of computer servers in cavernous buildings. "We are actively working to maximize the efficiency of our data centers, which account for most of the energy Google consumes worldwide." remarks Google’s green energy czar Bill Weihl. Google will funnel some of its profits into a new effort, dubbed RE
In the meantime, the industry as a whole has employed a few tricks to save watts. Efforts include rearranging the stacks of servers and the mechanics of their cooling, and using software to create multiple "virtual" computers, rather than having to deploy several real ones. Such virtualization has allowed computer maker Hewlett-Packard to consolidate 86 data centers spread throughout the world to just three, with three backups, says Pat Tiernan, the firm’s vice president of social and environmental responsibility.
The industry is also tackling the energy issue at the computer-chip level. Chipmakers such as Intel and AMD have shifted to so-called multi-core technology, which packs multiple processors into one circuit rather than separating them. "When we moved to multi-core and throttled down microprocessors, the energy savings were pretty substantial," says Allyson Klein, Inters marketing manager. Chipmakers continue to shrink circuits on the nanoscale as well, which "means a chip needs less electricity" to deliver the same performance, she adds.
One of the biggest energy sinks comes from the air-conditioning in that______.
选项
A、air-conditioning is needed to prevent computers from overheating
B、one kilowatt-hour is needed by air-conditioning to cool the computers
C、a data center needs air-conditioning desperately
D、air-conditiorting costs a large sum of money
答案
A
解析
此题为细节分析题。第二段指出,全世界电脑消耗电力能源很多,运转一台电脑从始至终所产生的电费将超过电脑的最初成本。该段第三句指出,最大的能量消耗不是来自电脑本身而是来自为防止电脑过热而使用的空调,电脑运行每消耗一千瓦时电量的同时,冷却服务器外壳也需要一千瓦时电量。因此可知,A选项为正确答案。
转载请注明原文地址:https://jikaoti.com/ti/NmX7FFFM
0
考研英语一
相关试题推荐
HowdoyouexplaineconomicsinplainEnglish?TheFederalReserveBankofNewYorkhasbeenansweringthequestionwithaneven
HowdoyouexplaineconomicsinplainEnglish?TheFederalReserveBankofNewYorkhasbeenansweringthequestionwithaneven
Peekthroughtheinspectionwindowsofthenearly100three-dimensional(3D)printersquietlymakingthingsatRedEye,acompany
Peekthroughtheinspectionwindowsofthenearly100three-dimensional(3D)printersquietlymakingthingsatRedEye,acompany
TheInternetWriteanessayof160-200wordsbasedonthedrawing.Inyouressay,youshould1)describethedrawingbri
There’sbeenalotofhandwringingabouthowtheUnitedStatesisfallingbehindinscienceeducation.Now,itlooksasthough
ThestaggeringvarietyoffreestuffavailableontheInternetsometimesseemstohaverepealedthefirstlawofeconomics:Ther
SupposeProfessorChenisgoingtospendoneyearawayfromhisinstitutiontopursueresearchinatmosphericscience.Writehim
Forthepast10,000yearshumanshaveinfluencedtheplantstheyuseatfirstunknowingly,laterbydesign.Today’scropshave
随机试题
甲状腺巨细胞型未分化癌的病理组织学特点是
卷材防水屋面防水层向垂直面的上卷高度通常为()mm。
假设ABC公司的股票现在的市价为30元。有1份以该股票为标的资产的看涨期权,执行价格为30.5元,到期时间是6个月。6个月以后股价有两种可能:上升35%,或者下降20%。无风险利率为每年4%。拟利用复制原理,建立一个投资组合,包括购进适量的股票以及借入必要
下列选项中,以“三基”为基本内容的是()。
()是世界上最早最完备的建筑学著作。
国务院总理李克强在2016年政府工作报告中提出:应鼓励企业开展个性化定制、柔性化生产,培育精益求精的(),增品种、提品质、创品牌。
重庆市近段时间开展大规模的街道整治活动,集中清理了路边摊、大排档等占道的行为,引起了社会各界的强烈反响,对此你怎么看?
根据以下资料,回答问题。我国近岸海域监测面积共279225平方千米。2010年,按监测点位计算,水质最好的一、二类海水占62.7%,比上年下降10.2个百分点:三类海水占14.1%,比上年上升8.1个百分点:四类和劣四类海水占23.2%,比上年上
老师再三强调,这个部分的内容一定不要忽略。
PASSAGETHREEWhatmattersmostwhenevaluatingapersoninSiliconValley?
最新回复
(
0
)