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
38
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.
The Solar Decathlon is most probably the name of a ______.
选项
A、technology
B、contest
C、strategy
D、machine
答案
B
解析
本题问Solar Decathlon最有可能是什么的名字。由judges will evaluate these homes and declare one the winner可以推断Solar Decathlon最有可能是一项比赛。所以正确答案是B。
转载请注明原文地址:https://jikaoti.com/ti/hCkYFFFM
0
考博英语
相关试题推荐
•Lookatthenotes.•Someinformationismissing.•Youwillhearawomantalkingtosomejournalistsaboutanewproductrang
•YouwillhearJanetWillis,amanagementconsultant,advisingDavidSmith,amanagingdirector,aboutusingamarketingservice
WhatdoesGeorgethinkaboutthenewcompanymagazine?Whyisthemanphoning?
WheredidDavidTorchmanworkbeforehestartedthemagazine?
Lookatthenotesaboutanenterprise.Someinformationismissing.YouwillhearpartofapresentationbytheInternationalMa
Youwillhearaconversationbetweenamanagerandanemployeemanagementconsultant.Foreachquestion(23-30),markonelette
Mindyourhead.Pleaseallowupto30daysfromreceiptoforderfordelivery.
CasaltalianaTwentyyearsago,itwasdifficulttofindfreshpastainBritainwithoutgoingtoanItalianrestaurant.
LittletonNewsUpdateTherateofunemploymentinLittleton,asmalltowninthesouthwestofEngland,hasreachedarecord
•Readthearticlebelowaboutteam-building.•Choosethecorrectwordtofilleachgap,fromA,BorConthenextpage.•For
随机试题
人事任用上要做到选贤任能,德才兼备,避免任人唯亲。这体现了人力资源管理的()原则。
体态语言中哪种使用频率最高【 】
眼的屈光装置不包括【】
下列有关使用糖皮质激素治疗SARS的适应证,错误的是
下列哪项不属于自发型心绞痛( )。
下列各项中,属于不相容职务的有()。
虚实结合法中的“实”指的是景点中具体实物的()。
休宁齐云山、枞阳浮山、贵池齐山地貌分别属于()地貌。
商品生产中,有一系列经济规律,而其中最基本的规律是()。
Theuseofnuclearpowerhasalreadyspreadallovertheworld.【C1】______,scientistsstillhavenotagreed【C2】______Whatshould
最新回复
(
0
)