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
The Features of Solar and Wind Energy Solar and wind energy seem to have captured the public’s support as potentially being
The Features of Solar and Wind Energy Solar and wind energy seem to have captured the public’s support as potentially being
admin
2013-07-08
103
问题
The Features of Solar and Wind Energy
Solar and wind energy seem to have captured the public’s support as potentially being the primary or total answer to our electric power needs despite the fact that solar cells and wind energy systems don’t always provide electric power.
Solar cells and wind turbines are attractive because they are "renewables" and because they emit no C02, during operation. But because solar and wind electricity are available only part of the time that consumers demand power, they cannot provide energy " on demand", something that the public requires. We expect the lights to go on when we turn on a switch, and we do not expect our computers to shut down as nature dictates.
Large-scale electric energy Storage with hydroelectric dams is a good way to solve the problem, but when we use hydroelectric dams for electric energy storage, we reduce their electric power output, which would otherwise have been used by consumers. In other words, we suffer a loss to gain power on demand from wind and solar.
At locations without such hydroelectric dams, which are most places, solar and wind electricity systems must be backed up 100 percent by other forms of generation to ensure against blackouts. In today’s world, that backup power can only come from fossil fuels. Then the public will pay a large amount of money for solar and wind—paying once for the solar and wind system and again for the fossil fuel system.
Finally, because solar and wind have the capacity to deliver only 30 to 40 percent of their full power ratings in even the best locations, they provide a C02 reduction of less than 30 to 40 percent, considering the fossil fuels needed for the backup. That’s far less than the 100 percent that many people believe, and it all comes with a high cost.
The United States will need an array of electric power production options to meet its needs in the years ahead. Solar and wind will have their places, as will other renewables. Realistically, however, solar and wind will probably only provide a modest percentage of future US power. Some serious realism in energy planning is needed, especially from analysts who are not backing one horse or another.
Why does the public support solar and wind energy?
选项
A、Because the public consider them the best substitutes for electricity.
B、Because the public believe they can provide enough electricity in the future.
C、Because they can supply electricity at any time in any places.
D、Because they are the most economical energy in the world.
答案
B
解析
事实细节题。由题干中的public support定位到第一段可知,尽管太阳能电池和风力发电系统不能持续长久的供电,大众还是认为它们能满足未来用电需求。故[B]“大众相信它们能够提供足够的电力”与原文意思相符。[A]“大众把它们看作是电力能源的最佳替代晶”,本段中人们认为地二者可以被用来发电,而不是直接取代电力,故排除;[C]“它们可以随时随地的提供电流”,与本段意思不符,故排除;[D]“它们是世界上最经济的能源”,文章当中并未对能源的经济性做出对比,故排除。
转载请注明原文地址:https://kaotiyun.com/show/ssO4777K
0
考研英语一
相关试题推荐
WhichofthefollowingisNOTtrueaccordingtothetext?OnJayaAgrawal’swebsite,whatarethecommonresponsestothedocto
Pleasewriteanoticeaboutholdingashort-termoralEnglishclassduringthesummerholidays.Yournoticeshouldcoverthesef
GehmanbelievedthathaditsadministratorsknownthedamagetoColumbia,NASAwould______.Whichofthefollowingstatements
GehmanbelievedthathaditsadministratorsknownthedamagetoColumbia,NASAwould______.Whatdoestheword"they"(Para.3
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Fewpeople,exceptconspiracytheorists,wouldhaveexpectedsopublicaspatastheonethisweekbetweenthetworingmasterso
(46)AtatimewhenWallStreetfirmsarebeingpunishedformisleadinginvestorsaboutdot-comstocksduringthebubble,it’sal
(46)AtatimewhenWallStreetfirmsarebeingpunishedformisleadinginvestorsaboutdot-comstocksduringthebubble,it’sal
随机试题
“中国起源论”的代表人物有()
在行政赔偿案中,经复议维持的案件,赔偿义务机关是()
TCP/IP是Internet的基本通信协议,由四层组成,它们是应用层、传输层以及________。
患者男性,36岁。反复发作上腹部疼痛伴呕吐2个月,呕吐物为宿食,呕吐后症状减轻,近1周症状加重而入院。体格检查:消瘦,轻度水肿,上腹部正中有轻压痛,有振水音。最重要的医疗诊断是
二妙散的功用是()
村民甲(18周岁)路过村民乙家门口时,用一块石头向乙家所养且卧在乙家门口的狗打去,该狗立即扑向甲,甲因跑得快未被狗咬,狗咬伤了甲旁边的行人丙。丙因躲避,将路边丁叫卖的西瓜踩碎3个。丙因治伤支付医药费80元。丁的3个西瓜价值16元。对丙、丁的损失应由谁赔偿?
总监理工程师变更时,应经项目法人同意,并通知()。
下列各项中,符合《企业内部控制应用指引第15号——全面预算》规定的是()。
2013年5月24日,中共中央政治局就大力推进生态文明建设进行第六次集体学习。中共中央总书记习近平在主持学习时强调,生态环境保护是功在当代、利在千秋的事业。要清醒认识保护生态环境、治理环境污染的紧迫性和艰巨性.清醒认识加强生态文明建设的重要性和必要性,以对
Inourculture,thesourcesofwhatwecallasenseof“mastery”--feelingimportantandworthwhile--andthesourcesofwhatwec
最新回复
(
0
)