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
131
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.
【F2】
选项
答案
今年,能源部将在核能的研究和开发上投入3.03亿美元;在煤炭上投入4.27亿美元;而在太阳能上仅投入区区1.59亿美元。
解析
转载请注明原文地址:https://kaotiyun.com/show/91oZ777K
0
考研英语一
相关试题推荐
RichardRortywasoneofthemosttalked-aboutthinkersinAmerica.EveryprofessionalphilosopherintheEnglish-speakingworld
Itwasjustafootnotecomparedwiththemoreinfectiousdisasterthatkilledmillionsmorepeoplein1918,butthe1957influen
Itwasjustafootnotecomparedwiththemoreinfectiousdisasterthatkilledmillionsmorepeoplein1918,butthe1957influen
Formorethanadecade,Dellhasposteddouble-digitgrowthbysellingcomputersdirectlytocustomers,mostofthemcorporatec
Apartfromanewfootballstadiumandsomesmartuniversitybuildings,mostofMiddlesbroughlooksasthoughitcametoadeadh
Theirdefenderssaytheyaremotivated,versatileworkerswhoarejustwhatcompaniesneedinthesedifficulttimes.Toothers,
Dieting,accordingtoanoldjoke,maynotactuallymakeyoulivelonger,butitsurefeelsthatway.Nevertheless,evidencehas
Forthepastfiveyears,Dr.StephenPosthasbeenfundingresearchprojectsthattesthowaltruism(selflessness),compassion,
Mothersinterferewiththeirchildren’slivesevenmorethanmostoffspringrealize.Thattheynagabouteatinghabitsiswellk
Alcoholmaytastesweeterifyouwereexposedtoitbeforebirth,suggestsastudyinrats.Thefindingsmayshednewlight【C1】_
随机试题
AnimalsintheCityRecently,therehavebeenmanyreportsinnewspapersandonTVaboutbiganimalscomingintotownsandc
A.无渣流质或半流质饮食B.高糖、高蛋白、高维生素、易消化饮食C.少量碳水化合物类流食,忌油脂食品D.易消化、无刺激性食物,少量多餐E.禁食蛋白,给高糖饮食
A.听会B.阳白C.风池D.风市E.丘墟善治内风、外风所致病证,为祛风要穴的是
WHO药品名称命名的原则是
患儿,8岁,患上呼吸道感染2周后,出现食欲减退、乏力、尿少、水肿。T37.5℃,BP增高。尿蛋白、红细胞各(+),补体c3降低。诊断为急性肾小球肾炎。其首选的护理诊断/问题是
目前常用的建筑装饰材料,按化学成分分类可分为()。
()衍生品是名义金额最大的衍生品。
我国公民李某于2012年10月1日在某市市区购买一套普通住房。面积80平方米,成交价格每平方米5000元,该住房是李某唯一一套住房。2012年12月28日由于李某调到外地工作,从2013年1月1日起,李某按市场价格将该房出租给张某用于居住,每月收取租金60
慢性根尖周炎的最重要的临床表现是()。
Turninyourcollectionofindustry-suppliedfreebiesandGoodmanwillsendbackafewreplacementpensbearingtheNoFreeLunc
最新回复
(
0
)