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
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on f
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on f
admin
2014-05-30
48
问题
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on foreign oil. But results of an electric-car pilot project presented recently at the annual meeting of the American Association for the Advancement of Science provide added incentive to go electric: Car owners could return unused electricity back to the grid(输电网)and make real money while doing it.
Electric cars need big, powerful batteries to accelerate to highway speeds and travel scores or even several hundred kilometers on a single charge. But because most drivers drive just a few dozen kilometers a day, most of that battery capacity sits unused. To take advantage of that storage capacity, Willett Kempton, director of the University of Delaware’s Center for Carbon-Free Power Integration in Lewes, teamed up with an electric car maker, several utilities, a software company, and PJM Interconnection, one of 10 regional organizations that coordinate and control the U.S. electrical grid.
To ensure that electricity flows steadily and without interruption, the U.S. government requires PJM Interconnection and its counterparts to have reserves of power in case a generator goes down and other electrical reserves to maintain the 60-Hz frequency of alternating current that our appliances and devices are accustomed to dealing with. Today, PJM Interconnection and its counterparts pay conventional power plants to maintain this reserve power. But as renewable energy sources such as wind and solar, which provide energy cleanly but intermittently, come online, these grid operators need to increase their storage capacity to ensure a steady electricity supply. So Kempton and his colleagues set out to provide some of the backup power from a fleet of parked electric cars.
Kempton’s team used an electric car from AC Propulsions, a California car company, which was custom-built to provide electricity back to the grid. They used commercially available software and hardware that companies such as PJM Interconnection use to monitor and control energy flow. In November, the company hooked the grid up to the car, and Kempton’s team’s electric car became the first car in the world to earn its keep as a backup electric power source. At the rates that PJM Interconnection pays today to maintain power reserves, a hooked-in electric car could generate $1,800 a year for its owner.
"I think it’s tremendously exciting," says Kathryn Clay, director of research for the Alliance of Automobile Manufacturers. "The extra dollars an electric car provides will not be enough by themselves to get consumers to adopt grid-enabled vehicles—for that we also need better and less expensive batteries and tax incentives to give the market an encouragement" Nevertheless, "it’s an incentive to push in the right direction."
Kathryn Clay thinks that money made by providing electricity back to the grip _____.
选项
A、can cover the expenses on the car
B、isn’t as effective as other incentives
C、isn’t attractive enough for consumers
D、may increase remarkably in the future
答案
C
解析
原文该句中的not enough表明Kathryn Clay对电动车额外挣的钱抱着不太满意的态度,四个选项中,只有B和C表示不太满意的态度。原文句中提到其他incentives的时候用了also一词,这个词不能表明电动车额外挣的钱和其他incentives之间哪个更重要,据此排除B。
转载请注明原文地址:https://kaotiyun.com/show/Te17777K
0
大学英语六级
相关试题推荐
Peoplelikebeingtrusted.Theyareannoyed,angry,orfeelhurtiftheyareregardedwith【C1】______.Theythinkthattheyare【C
Itistruethattheworldfacesproblemsofpollution,butitcan______(通过全球的努力加以控制).
A、Shehasn’tpreparedthecourseoutlineyet.B、Themancangetthecourseoutlineafterclass.C、Therearen’tanycopiesofthe
Tobestprotectthreatenedplants,inefficientnationalparksshouldbesoldoffandtheproceedsusedtobuymorecost-effectiv
A、Risingfuelcoststolimittheuseofit.B、Savingenergyanduseothersources.C、Havingprotectionagainstfuelshortage.D、
A、Thewoman’snewhouse.B、Thewoman’sstory.C、Theman’sexperience.D、Theman’sdaughter.B男士说,听说女士的房子上个星期天着火了,一定是一次很特别的经历;女士说
A、Atthepostoffice.B、Attheshop.C、Attherestaurant.D、Atthebank.B男士问女士要不要等裙子包装好自己带走,女士请男士在本周内送货,说明对话发生在商店里,只有在商店买东西的时候才
Withgraduateunemploymentatitshighestformorethanadecade,thelureoftheparentalnesthasneverbeenstronger.Butspo
Oldpeoplearealwayssayingthattheyoungarenotwhattheywere.Thesamecommentis【C1】______fromgenerationtogenerationa
A、Warmerwatertemperature.B、Lessmarinelife.C、Ariseofsealevel.D、Colderwinds.C细节题。对话结尾处女士说,南极洲1/10的冰川融化将会导致全球海平面上升30英尺
随机试题
茶艺服务人员在任何情况和场合下都要有自控情绪和行为的能力
公司筹资方式不同,资本成本大小和风险高低也就各异,所以公司筹资决策中的核心问题是()
A、视神经B、三叉神经C、副神经D、滑车神经E、舌下神经第Ⅱ对脑神经是()
图示结构El=常数,在给定荷载作用下,剪力QAB为:
建没工程生产安全事故应急预案的管理包括()。
根据城市用地适用性评价结论,不适于修建的用地是()。
建筑灭火器配置验收合格的判定条件是()。
下列选项中,不是建筑艺术的基本特征的是()。
没有人爱每一个人;牛郎爱织女;织女爱每一个爱牛郎的人。如果上述断定为真,则以下哪项不可能为真?Ⅰ.每一个人都爱牛郎。Ⅱ.每一个人都爱一些人。Ⅲ.织女不爱牛郎。
Suchachangewouldnot______tothewishesofthegreatmajorityofthepeople.
最新回复
(
0
)