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
2019-08-01
77
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.
The study of the effectiveness of daylight saving _____.
选项
A、was started by the U.S. Department of Transportation
B、was initiated by Benjamin Franklin in 1784 to save electricity
C、was rarely done as the electricity usage patterns changed
D、needs to be done to help the government change its policies
答案
C
解析
事实细节题。根据题干定位到文章第二、三段。第三段提到,马修说“从那以后就很少有关于夏时制节能效果的研究了,那段时间美国的用电模式发生了变化”,故C项符合题意。
转载请注明原文地址:https://kaotiyun.com/show/wm2Z777K
0
考研英语一
相关试题推荐
Musicproducesprofoundandlastingchangesinthebrain.Schoolsshouldaddmusicclasses,notcutthem.Nearly20yearsago,a
Musicproducesprofoundandlastingchangesinthebrain.Schoolsshouldaddmusicclasses,notcutthem.Nearly20yearsago,a
TransatlanticfrictionbetweencompaniesandregulatorshasgrownasEurope’sdataguardianshavebecomemoreassertive.Frances
AGettingcarriedawaywiththecultureB.CarryingvastamountofluggageC.StayingontheroadtoolongD.Wearin
AGettingcarriedawaywiththecultureB.CarryingvastamountofluggageC.StayingontheroadtoolongD.Wearin
Organisedvolunteeringandworkexperiencehaslongbeenavitalcompaniontouniversitydegreecourses.Usuallyitisleftto【C
A.HaveenoughinformationB.ListentoyourGremlinC.TestthemagainstyourvaluesD.RespectyourdoubtsE.
AnonymityisnotsomethingwhichwasinventedwiththeInternet.Anonymityandpseudonymityhasoccurredthroughouthistory.For
"Thisisareallyexcitingtime—aneweraisstarting,"saysPeterBazalgette,thechiefcreativeofficerofEndemol,thetelev
随机试题
A.阴阳二气的交感B.阴阳二气的制约C.阴阳二气的运动D.阴阳二气的互根阴阳对立的基础是
女性,30岁,疲劳、怕冷、体重增加、嗜睡、精神抑郁、便秘、闭经半年,甲状腺肿大。下列各项中诊断价值最大的是
患者女,76岁,农民。既往曾经有癔症病史,表现为阵阵哭泣,说神道鬼等,有服用奋乃静等药物治疗史。近3周来常诉看到周围有一群小人在活动,这群小人有时在她身边玩耍,有时还跳到她的椅子、桌子上又唱歌又跳舞,家里的人听到她讲述后感到其可能有精神异常,故今送到我院就
患者,男,35岁。身热,面红,口渴,但饮水不多,下利清谷,舌淡苔白,脉浮大无力。临床诊断最可能是
采用单板双端固定,把衬铅板铺设在壳体上以后,在铅衬里需要固定的位置开两个方孔,两个方孔的距离随实际而定,这种铅衬里的固定方法称之为()。
传统加密方法包括替代密码和双钥技术。()
陶渊明最著名的代表作有()。
如果数值型字段的宽度为10,小数位数为2,则其整数部分的最大值是______。
Mostpeoplearefamiliarwithcomicbooksandcomicstrips.Thecomicstripisusuallyfoundindailynewspapers.Itismadeup
TheCentralBankisbusywithestimatingthecirculationofitscurrencyintheeconomy.Theunderlinedpartmeans______.
最新回复
(
0
)