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
外语
The Solar Decathlon is under way, and trams of students from 14 colleges and universities are building solar-powered homes on th
The Solar Decathlon is under way, and trams of students from 14 colleges and universities are building solar-powered homes on th
admin
2010-02-21
41
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.
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://jikaoti.com/ti/ACkYFFFM
0
考博英语
相关试题推荐
•Lookatthenotes.•Someinformationismissing.•Youwillhearawomantalkingtosomejournalistsaboutanewproductrang
•Lookatthenotesbelow.•Someinformationismissing.•YouwillhearaninterviewbetweenAnnaMarsh,whoworksforabusiness
Lookatthenotesbelow.Someinformationismissing.Youwillhearawomantalkingabouttwonewproducts.Foreachquestion9-
JustineisparticularlypleasedaboutthecompanyMoretrainingisrequiredbecausethecompanyhas
Thecompany’sturnoverdecreasedsteadilybetween2000and2002whereasitsprofitdeclinedslightlybeforestartingtorecover.
•Readthearticlebelowaboutteam-building.•Choosethecorrectwordtofilleachgap,fromA,BorConthenextpage.•For
Lookatthechartsbelow.Theyshowprofitsbeforetaxandprofitmarginsforeightdifferentcompaniesfrom1998to2002Which
Salesreachedapeakinthemiddleofthequarterin1990beforedecreasingslightly,whereasin2000salesfluctuatedthroughou
Therewasasteadyfallinsalesduring1990,whilein2000salesdippedslightlybeforerecoveringtowardstheendofthequart
Ifthedisputeisnotsettledina(n)______waysoon,thetwocountrieswillcertainlygotowar.
随机试题
组织中的各项规章制度对职工的消极行为是个约束,一般地说都与一定物质利益没有关系。()
出现唾液成分浓度显著性增高,而单位时间总量显著性下降特征性改变的疾病是
粪便的主要色素是在血中与清蛋白结合进行运输的是
下列属于破产费用的是()。
下列关于严重危及施工安全的工艺、设备、材料淘汰制度的说法中,正确的是()。
金融市场的核心内容是()。
审议表决应当遵循“集体审查审议,明确发表意见,少数服从多数”的原则,。()
投资银行按议定价格直接从发行人手中购进将要发行的全部证券,然后再出售给投资者,同时在指定期限内将所筹集资金交付给发行人,这种证券承销方式是()。
下列关于不兑现的纸币本位制的特点的说法,正确的是()。
Asthepaceoflifecontinuestoincrease,wearefastlosingtheartofrelaxation.Onceyouareinthehabitofrushingthroug
最新回复
(
0
)