首页
登录
职称英语
The Solar Decathlon is under way, and teams of students from 14 colleges and
The Solar Decathlon is under way, and teams of students from 14 colleges and
游客
2025-04-21
29
管理
问题
The Solar Decathlon is under way, and teams 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 rained 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 run.
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, lake 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 manufacturers 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] It can be inferred that "a passbook savings account" ______.
选项
A、brings little interest
B、brings much interest
C、is a deposit of at least $ 100
D、is a deposit of at least $ 5000
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4047118.html
相关试题推荐
TheSolarDecathlonisunderway,andteamsofstudentsfrom14collegesand
TheSolarDecathlonisunderway,andteamsofstudentsfrom14collegesand
TheSolarDecathlonisunderway,andteamsofstudentsfrom14collegesand
ScienceFictioncanprovidestudentsinterestedinthefuturewithabasici
ScienceFictioncanprovidestudentsinterestedinthefuturewithabasici
ScienceFictioncanprovidestudentsinterestedinthefuturewithabasici
Duringthereadinglesson,theteacheraskedstudentstoreadafew_____fromthe
Althoughtherearemorefemalestudentsatthecollegethanmalestudents,thew
Examinationsdonot______studentstoseekmoreknowledge.A、exertB、instructC、mo
"Theprojectgoalisforstudentstobuildcomplexandinterestingsentences,an
随机试题
Indiansalwaysshake(摇)theirheadstheytalktoothers.【C1】________doesnot
I(11)thefirstdayfsawherplayingbasketball.Iwatchedinwonderass
"Congratulations,youarestillintherunningtowardsbecomeAmerica’sNextTop
作者张三创作了一部作品,生前没有发表,也未表示不发表,在遗嘱中将该作品的著作权赠
()产生的内部根源,直接说来在于医务人员的社会性;最终说来在于它攸关自己最为
男者45岁,一周前因急性阑尾炎,进行手术治疗时,阑尾系膜出血,缝扎止血时致回肠末
某合同执行政府定价。签订合同时价格2000元/t,约定2008年3月1日交货,但
STGT试验延长,用硫酸钡吸附血浆不能纠正,用正常血浆及正常血清均能纠正,提示A
目前,越来越多的新婚夫妇登记结婚前进行个人财产登记,这种做法无论对社会还是对家庭
王某与钱某系夫妻,因感情不和王某提起离婚诉讼,一审法院经审理判决不准予离婚。王某
最新回复
(
0
)