首页
登录
职称英语
The Solar Decathlon is under way, and trams of students from 14 colleges and
The Solar Decathlon is under way, and trams of students from 14 colleges and
游客
2025-05-10
8
管理
问题
The Solar Decathlon is under way, and trams of students from 14 colleges and universities are building solar-powered homes on the National Mall in Washington, D.C. in an effort to promote this alternative energy source. This week judges in this Department of Energy (DOE) sponsored event will evaluate these homes and declare one the winner. Unfortunately, for the participants, it mined on the Sept 26th opening ceremonies, and the skies over the Washington have remained mostly overcast since. However, the conditions may have made for a more revealing demonstration of solar energy than was originally planned.
Although the Solar Decathlon’s purpose is to advertise the benefits of electricity-generating solar panels and other residential solar gadgets, the bad weather has made it hard to ignore the limitations. As fate so amply demonstrated, not every day is a sunny day, and indeed DOE’s "Solar Village on the National Mall" has received very little of what it needs to nm.
Since solar is not an always available energy source, even a community consisting entirely of solar homes and businesses would still need to be connected to a constantly-running power plant (most likely natural gas or coal fired) to provide reliable electricity. For this reason, the fossil fuel savings and environmental benefits of solar are considerably smaller than many proponents suggest.
Washington, D.C. gets its share of sunny days as well, but even so, solar equipment provides only a modest amount of energy in relation to its cost. In fact, a $5,000 rooftop photovoltaic system typically generates no more than $100 of electricity per year, providing a rate of return comparable to a passbook savings account.
Nor do the costs end when the system is installed. Like anything exposed to the elements, solar equipment is subject to wear and storm damage, and may need ongoing maintenance and repairs. In addition, the materials that turn sunlight into electricity degrade over time. Thus, solar panels will eventually need to be replaced, most likely before the investment has fully paid itself off in the form of reduced utility bills.
Solar energy has always had its share of true believers willing to pay extra to feel good about their homes and themselves. But for homeowners who view it as an investment, it is not a good one. The economic realities are rarely acknowledged by the government officials and solar equipment manufactures involved in the Solar Decathlon and similarly one-sided promotions. By failing to be objective, the pro-solar crowd does consumers a real disservice. [br] What has happened to DOE’s "solar Village on the National Mall"?
选项
A、It has revealed a mechanical problem.
B、It lacks the energy for operation.
C、It needs substantial financial support.
D、It has drawn criticism from the government.
答案
B
解析
由not every day is a sunny day, and indeed DOE’s "Solar Village on the National Mall" has received very little of what it needs to run可知正确答案是B(它没有能源来运行)。
转载请注明原文地址:https://tihaiku.com/zcyy/4069732.html
相关试题推荐
TheSolarDecathlonisunderway,andtramsofstudentsfrom14collegesand
TheSolarDecathlonisunderway,andtramsofstudentsfrom14collegesand
(66)Applicationfilesarepiledhighlythismonthincollegesacrossthecoun
(66)Applicationfilesarepiledhighlythismonthincollegesacrossthecoun
(66)Applicationfilesarepiledhighlythismonthincollegesacrossthecoun
(66)Applicationfilesarepiledhighlythismonthincollegesacrossthecoun
(66)Applicationfilesarepiledhighlythismonthincollegesacrossthecoun
(66)Applicationfilesarepiledhighlythismonthincollegesacrossthecoun
Successfulstudentssometimesbecomeso______withgradesthattheyneverenjoy
Ourstudents’educationalachievementsequal,andinmanycases______,thoseof
随机试题
Awomanandamangetintoacaraccident,andit’sabadone.Bothcarsar
当然恐惧还是有些道理的。我们正处在一个变化的时代。我们深感变化的必要性,我们正在变,我们必须变。我们抵挡不住变化:就像树叶到秋天挡不住要变黄、变枯、球茎
AreTeenagersReallyCarelessAboutOnlinePrivacy?[A]Theyshare,like,ev
Stratford-on-Avon,asweallknow,hasonlyoneindustry—WilliamShakespeare—.
建立城镇职工基本医疗保险制度的原则是什么?
某社区卫生服务站自建立以来都有比较稳定和持久的资金来源,从而保障了其服务的正常开
A.玫瑰花样结构 B.双层导管结构 C.星网状层结构 D.黏液样区域 E
日本公司在纽约发行的美元债券属于()。A.欧洲债券 B.外国债券 C.美国债
下列环节同时征收消费税和增值税的有( )。A.高尔夫球及球具的生产销售环节
医疗事故的主观方面为 A造成患者人身损害 B过失 C违法行为和损害结果
最新回复
(
0
)