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
2019-09-30
86
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, Intel’s 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、one kilowatt-hour is needed by air-conditioning to cool the computers
B、air-conditioning costs a large sum of money
C、air-conditioning is needed to prevent computers from overheating
D、a data center needs air-conditioning desperately
答案
C
解析
事实细节题。该段第三句提出最大的能量消耗不是来自电脑本身而是来自于为防止电脑过热而使用的空调,第四句的举例形象地说明了此原因,故C项正确。
转载请注明原文地址:https://kaotiyun.com/show/UYe4777K
0
考研英语二
相关试题推荐
Thesentence"Aftereachrainshower,anotherInternetmillionairesprangup"(Paragraph1)means______.Whatcanbeinferred
Allthepeople______treatmentprotestedthatthemedicalfeewastoohightobeacceptable.
Leadingdoctorstodayweighinonthedebateoverthegovernment’sroleinpromotingpublichealthbydemandingthatministersi
Leadingdoctorstodayweighinonthedebateoverthegovernment’sroleinpromotingpublichealthbydemandingthatministersi
TheInternetaffordsanonymitytoitsusers,ablessingtoprivacyandfreedomofspeech.Butthatveryanonymityisalsobehind
TheInternetaffordsanonymitytoitsusers,ablessingtoprivacyandfreedomofspeech.Butthatveryanonymityisalsobehind
Whilethere’sneveragoodagetogetcancer,peopleintheir20sand30scanfeelparticularlyisolated.Theaverageageofac
Everyone,itseems,hasahealthproblem.AfterpouringbillionsintotheNationalHealthService,Britishpeoplemoanaboutdir
AdvertisinghasbeenamongEngland’sbiggestgrowthindustriessincethewar,intermsoftheratioofmoneyearningstodemonst
PublichealthofficialsgrapplingwiththeobesityepidemichavedebatedawiderangeofapproachestohelpingslimtheAmerican
随机试题
霞,是我的老朋友了!我童年在海边、在山上,她都是我的最熟悉最美丽的小伙伴。她每早每晚都在光明中和我说“早上好”或“明天见”。但我直到几十年以后,才体会到云彩更多,霞光才愈美丽。从云翳中外露的霞光,才是璀璨多彩的。生命中不是只有快乐,也不是只有痛苦
混合动力电动汽车动力性能试验第一阶段包括哪几项试验?
主要用于夹持、稳定或提起组织,便于组织切开及缝合的器械是
关于盐桥叙述错误的是:
A公司授权其采购员甲到B公司购买一批计算机,并交给甲已经盖公司公章的空白合同书,甲用此合同书与B公司订立了购买一批电视机的合同,发生纠纷后,应当( )。
所谓变造会计凭证、会计账簿及其他会计资料,是指以虚假的事项为前提编造不真实的会计凭证、会计账簿及其他会计资料。()
1924年3月2113,马萨诸塞投资信托基金在波士顿成立,这是全球第一只( )。
秉公执法,办事公道,其核心就是一个“公”字。()
下列英文缩写和中文名字的对照中,正确的是()。
Theresultsofthenewstudyareunexpected.Fungusandmoldsinlocalfoodsmaybepartlyresponsibleforthehighcancerrate
最新回复
(
0
)