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
考研
Starting this month, roughly one quarter of the world’s population will lose sleep and gain sunlight as they set their clocks ah
Starting this month, roughly one quarter of the world’s population will lose sleep and gain sunlight as they set their clocks ah
admin
2015-05-24
40
问题
Starting this month, roughly one quarter of the world’s population will lose sleep and gain sunlight as they set their clocks ahead for daylight saving. People may think that with the time shift, they are conserving electricity otherwise spent on lighting. But recent studies have cast doubt on the energy argument— some research has even found that it ultimately leads to greater power use.
Benjamin Franklin is credited with conceiving the idea of daylight saving in 1784 to conserve candles, but the U.S. did not institute it until World War I as a way to preserve resources for the war effort. The first comprehensive study of its effectiveness occurred during the oil crisis of the 1970s, when the U.S. Department of Transportation found that daylight saving trimmed national electricity usage by roughly 1 percent compared with standard time.
Scant research had been done since, during which time U.S. electricity usage patterns have changed as air conditioning and household electronics have become more pervasive, observes economist Matthew Kotchen of the University of California, Santa Barbara. But lately, changes to daylight saving policies on state and federal levels have presented investigators new chances to explore the before-and-after impacts of the clock shift.
In 2006 Indiana instituted daylight saving statewide for the first time. Examining electricity usage and billing since the statewide change, Kotchen and his colleague Laura Grant unexpectedly found that daylight time led to a 1 percent overall rise in residential electricity use, costing the state an extra $9 million. Although daylight time reduces demand for household lighting, the researchers suggest that it increased demand for cooling on summer evenings and heating in early spring and late fall mornings.
Not all recent analyses suggest that daylight saving is counterproductive. Instead of studying the impact daylight saving changes had on just one state, senior analyst Jeff Dowd and his colleagues at the U.S. Department of Energy investigated what effect it might have on national energy consumption, looking at 67 electric utilities across the country. In their report to Congress, they conclude that the four-week extension of daylight time saved about 0.5 percent of the nation’s electricity per day, or 1.3 trillion watt-hours in total. That amount could power 100,000 households for a year. The study did not just look at residential electricity use but commercial use as well, Dowd says. The disparities between regional and national results could reflect climate differences between states. "The effect we saw could be even worse in Florida, where air conditioning is used heavily," Kotchen suggests.
What effect did daylight saving have on the energy consumption of Indiana?
选项
A、It saved 1.3 trillion watt-hours in four weeks.
B、It reduced demand for household lighting only in spring.
C、It resulted in an extra $9 million cost on electricity.
D、It reduced demand for cooling and heating all year around.
答案
C
解析
事实细节题。根据题干中的Indiana可定位到第四段。根据研究人员的观察可知。印第安纳实行夏时制后,用电量增加,电费增长了900万美元,故C项正确。
转载请注明原文地址:https://kaotiyun.com/show/jN74777K
0
考研英语一
相关试题推荐
Intelligencequotients(IQs)testingiscontroversialandregardedbysomeasacrudeindicatorofabilityorpotential.Whenco
Marriage,anditsmanyupsanddowns,stilloften【C1】______theheadlinesonnewspapers,magazinesandtheairwaves.Nearly23mA
NewBookofEconomics—AnimalSpiritsNotwoeconomiccrisesareidentical.Butthesamequestio
AboutPainPain,unfortunately,isahorriblenecessityoflife.Itprotectspeoplebyalertingthemtothingsthatmightin
McKinsey’sResearchPaperAboutReducingGreenhouseGasesMcKinseyReportonReducingGreenhouseGases:TheUnitedStatesco
Weareonthevergeofdestroyingourozonelayer.Weareclosetodestroyinghundredsofexquisiteanimalspecies.Moreover,we
Istheprofessionalbookreviewerold-fashioned?InarecentHarvardBusinessSchoolstudyofnonfictionreviews,assessmentsin
Studythefollowingpicturecarefullyandwriteanessayentitled"TraditionProtectionandModernDevelopment".Inthisessay
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal【C1】______anarea.Thesizeoftheareaissufficie
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal【C1】______anarea.Thesizeoftheareaissufficie
随机试题
男,10岁,“感冒”发热10天后出现眼睑水肿,尿色如茶水。体检:颜面及眼睑均有轻度水肿,血压120/90mmHg(16/12kpa);心肺正常。肝于右肋下1cm,质中硬,轻度压痛:双肾区轻微叩击痛。尿蛋白(++),尿镜检RBC满视野/HP,WBC0~3个
初步可行性研究是对拟建工程项目进行初步分析,论证项目投资建设的()。
下面不符合推动现代农业建设目标的是()。
标的物在订立买卖合同之前已为买受人占有,合同生效即视为完成交付的交付方式是()。
光纤布放时,槽道内光纤应顺直、不扭绞,应加套管或线槽进行保护,无套管保护处用扎带绑扎,但不宜过紧。拐弯处曲率半径至少大于光缆直径的()。
“重学习、轻心理”是青少年心理压力负荷过重的基本原因。()
中国高校招生考试史上,1952年是一个非常重要的年份,它成为新旧招生制度的_______,标志着“高考时代”的开始。
有a、b、c三种浓度不同的溶液,按a与b的质量比为5:3混合,得到的溶液浓度为13.75%;按a与b的质量比为3:5混合,得到的溶液浓度为16.25%;按a、b、c的质量比为1:2:5混合,得到的溶液浓度为31.25%。问溶液c的浓度为多少?()
某重点大学的学生中,有的是共产党员,有的不仅是共产党员,而且是校学生会干部。所有的共产党员都是学习良好的学生。所有成绩良好的学生都遵守学校的规定。如果上述断定为真,以下除了哪项外都一定真?
Employee的表结构为:职工号、单位号、工资,与SELECT*FROMEmployeeWHERE工资>=10000AND工资
最新回复
(
0
)