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
By far the biggest hurdle to expansion of solar power is cost. Solar panels are usually made of silicon, and the world is runnin
By far the biggest hurdle to expansion of solar power is cost. Solar panels are usually made of silicon, and the world is runnin
admin
2016-08-02
51
问题
By far the biggest hurdle to expansion of solar power is cost. Solar panels are usually made of silicon, and the world is running out of it. Yet the economics of solar may be about to change.【F1】
Aided by hefty infusions of venture capital in recent years, solar companies are on the cusp of developing new technologies that generate more power using less silicon, prompting predictions that costs for solar systems could be cut in half within the next three years.
That process might be accelerated with a little more nurturing from the federal government.【F2】
This year, the Energy Department will spend $ 303 million on research and development for nuclear power and $427 million on coal, while forking out a paltry $159 million on solar.
That may be because the country gets less than 0. 01% of its electricity from the sun, but it doesn’t reflect solar power’s potential.
Enough solar energy hits the Earth in an hour to supply all the world’s electricity needs for a year. A 100-square-mile area of Nevada, if equipped with solar devices, could supply the U. S. with all the power it needs, according to the Energy Department. Again, such pronouncements don’t address the real-world practicalities.【F3】
But given that neither coal nor nuclear power is a practical solution to global warming, U. S. research priorities are badly skewed.
If roof-mounted solar panels aren’t quite ready for prime time, concentrated solar power systems might soon become a hit.【F4】
These are usually arrays of reflectors installed in sunny areas like the Mojave Desert, where they concentrate sunlight to heat a liquid that turns to steam and powers a turbine.
【F5】
The Solar Energy Generating Systems, an installation of nine solar arrays in the Mojave that puts out 354 megawatts, has been considered the biggest such plant in the world, but it won’t be for long.
Five more Mojave plants are scheduled to come on line in the next few years; together they will generate more than 1 , 000 megawatts. These projects have to jump many of the same transmission hurdles as wind farms.
【F5】
选项
答案
在莫哈韦沙漠安装的9组太阳能反射板构成的太阳能发电系统可发电354兆瓦。这被看做是目前世界上最大的太阳能发电系统,但过不了多久就会落伍。
解析
转载请注明原文地址:https://kaotiyun.com/show/B1oZ777K
0
考研英语一
相关试题推荐
Intheory,agovernmentbailoutshouldprovideashort-term"infusionofcashtogiveastrugglingcompanythechancetorighti
ThestaggeringvarietyoffreestuffavailableontheInternetsometimesseemstohaverepealedthefirstlawofeconomics:Ther
Aslongaspeoplehavelookedupatthenightsky,theyhavewonderedwhetherhumanityisaloneintheuniverse.ofplacesclose
Dieting,accordingtoanoldjoke,maynotactuallymakeyoulivelonger,butitsurefeelsthatway.Nevertheless,evidencehas
Writingforanhistoricalseriesistricky,andtheoutcomeisnotalwaysasuccess.ThebestoverallEuropeanhistoryinEnglis
Insomecountries,societalandfamilialtreatmentoftheelderlyusuallyreflectsagreatdegreeofindependenceandindividual
Thetranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages,full【C1】______inthehandlingofhistarget
Cultureinfluencesanindividual’shealthbeliefs,behaviours,activitiesandmedicaltreatmentoutcomes.【C1】______thesignifica
Besidethe580FreewayeastoftheSanFranciscoRay,thehillsarealivewiththesoundofwhooshing.Windturbinescovertheh
随机试题
刺激动物中脑网状结构可使动物
根据骨度分寸,除哪项外,两者间距都是9寸
1993年6月26日,银川铝型材厂从中国银行银川市支行中湖储蓄所购买了100张面额100元的定期定额有奖储蓄存单,存单背面标明中奖率为100%。1993年7月10日,中国银行银川市支行公开摇奖,在《宁夏日报》第4版上公布了中奖号码,同时规定从1993年7月
保险公司投资连结保险的投资账户与其管理的其他资产或其他投资账户之间存在( )。
根据车辆购置税的有关规定,下列应税车辆中,计税依据为纳税人提供的有效价格证明注明的价格的有()。
在课堂教学中,老师引导学生分别演奏《欢乐颂》的两个声部并合奏,然后分辨两声部间的音程关系,其教学重点是()。
Thriftyshoppersdonothavetolookfartofindabargain.Offersaboundinthecut-throatworldofBritishsupermarkets.Recei
Readthearticlebelow.Choosethebestsentencefromthelistonthenextpagetofilleachofthegaps.Foreachgap(1
A、It’sgood.B、It’sfull.C、It’sonthebed.C
Therearenowover700millionmotorvehiclesintheworldandthenumberisrisingbymorethan40millioneachyear.Theavera
最新回复
(
0
)