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
One of the biggest hurdles to getting more electric cars on the road is " range anxiety," the worry people have of their car bat
One of the biggest hurdles to getting more electric cars on the road is " range anxiety," the worry people have of their car bat
admin
2018-02-17
52
问题
One of the biggest hurdles to getting more electric cars on the road is " range anxiety," the worry people have of their car battery dying before they get to a charging station. A new study should help brush those fears aside.
Most American drivers do not go beyond the distance that today’s electric cars can go on a single battery charge in one day, the study found. In fact, 87 percent of the vehicles on the road could be replaced by low-cost EVs on the market today even if they were only charged overnight, say the MIT researchers who conducted the study published in Nature Energy. If this large-scale
swap
were to happen, it would lead to roughly 30 percent less carbon emissions even if the electricity were coming from carbon-emitting power plants.
The researchers analyzed daily vehicle travel patterns across the U. S. by bringing together two large datasets. One, the National Household Travel Survey, gave them information on millions of trips made by all kinds of cars. The other included detailed GPS-based data collected by state agencies that measured second-by-second velocity of each kind of trip. The researchers also factored in ambient temperature and inefficient driving behavior to calculate the energy consumption of each trip: extensive heating or cooling and driving habits such as hard acceleration zap energy and can reduce driving range.
Taking the 2013 Nissan Leaf as an example of an affordable EV on the market, the researchers found that it could meet the driving needs of 87 percent of vehicles on a single day. That number could go up to 98 percent as batteries meet new capacity targets set by the Advanced Research Projects Agency-Energy.
What about the remaining 13 percent of trips? The researchers admit that electric cars might not cut it for longer trips, such as vacation travel. For those times, they suggest that people in a two-car household could use their gasoline-powered vehicle, or they could rely on car-sharing or renting services.
The data covered the country’s 12 major metro cities, from dense urban areas such as New York to sprawling cities like Houston. Surprisingly, the adoption potential of electric vehicles was pretty similar across these diverse cities: it only varied from 84-93 percent. " This goes against the view that electric vehicles—at least affordable ones, which have limited range—only really work in dense urban centers," said the study’s lead author Jessika E. Trancik in a press release.
Trancik and her colleagues admit that addressing range anxiety might not be enough to boost EV sales. "Satisfying consumer preferences for vehicle performance and aesthetics will also be important, as will financing options to offset the purchase price," they say in the paper.
What do we know about electric cars today?
选项
A、They can travel for one day on a single charge.
B、They can replace 13 percent of gas vehicles.
C、They surpass a typical American’s daily driving distance.
D、They help to cut the prices of gas vehicles.
答案
C
解析
信息筛选题。答案可定位到第二段第一句Most American drivers do not go beyond the distance that today’s electric cars can go on a single battery charge in one day,即绝大多数美国司机驾驶机动车的单日行驶里程不会超出电动汽车的单次充电续航里程,而非选项[A]所述“电动汽车单次充电后能行驶一天”。选项[B]数据有误,能替换的燃油汽车不是13%,而是87%。选项[D]“有助于降低燃油汽车的价格”属于主观臆断,文中没有对应信息。
转载请注明原文地址:https://kaotiyun.com/show/wtBZ777K
0
考研英语一
相关试题推荐
BeautyisbigbusinessinChina.Thecountry’scosmeticsmarketisworth$26billionayear,makingitthethird-biggestinthe
BeautyisbigbusinessinChina.Thecountry’scosmeticsmarketisworth$26billionayear,makingitthethird-biggestinthe
BeautyisbigbusinessinChina.Thecountry’scosmeticsmarketisworth$26billionayear,makingitthethird-biggestinthe
BeautyisbigbusinessinChina.Thecountry’scosmeticsmarketisworth$26billionayear,makingitthethird-biggestinthe
BeautyisbigbusinessinChina.Thecountry’scosmeticsmarketisworth$26billionayear,makingitthethird-biggestinthe
[A]Theseissuescutrightacrosstraditionalreligiousdogma.Manypeopleclingtothebeliefthattheoriginofliferequired
SupposeyoufailedtofinishanimportanttaskassignedbyProfessorLiubecauseofasevereillness.Writehimaletterto
Themythologyofaculturecanprovidesomevitalinsightsintothebeliefsandvaluesofthatculture.【F1】Byusingfantastican
随机试题
下列哪项不符合甲状腺危象的诊断标准
书写病历一般不宜使用纯蓝墨水,主要原因是
绝经过渡期阴道流血最常见原因是
下列关于急性龈乳头炎,说法错误的是
“与pH较低的注射液配伍时易产生沉淀”的药物不是
沿江市市委书记刘岚廷的爱人孙荷芳是个体户,在沿江市沿河大道租了一间颇为豪华的店面卖高级服装。每年收入均为数万元,家中已有积蓄40余万元。但不幸的是,孙荷芳一次外出采购,却因车祸身亡。这时,银行找到刘岚廷说,孙荷芳这几年共欠有贷款30余万元,要求刘岚廷替妻还
甲、乙为夫妻(户籍所在地为H市大河区),二人于20l8年10月以150万元的价格购置H市理光区彩霞路一套房屋,后因房屋距离工作单位较远,夫妻商议决定将房屋卖掉,但未找到合适的买主。20l9年2月初,乙赴外地出差,住H市文化区的丙找到甲,称过去在乙带领下已看
过度的信贷供给是造成通货膨胀的直接原因,而导致信贷供给过度的具体原因又有很多方面,包括()。
填入下面横线处的句子,与上下文前后连贯、音节和谐的一组是:(1)唐诗以韵胜,故丰腴;宋诗以意胜,故瘦劲。譬诸花,则________。(2)苏州诸园,________:网狮园清雅恬淡,神韵独超;留园秀色夺人,风姿自妙……①唐诗如芍药海棠,秾花繁彩;宋诗
设二维随机变量(X,Y)服从N(μ,μ;σ2,σ2;0),则E(XY2)=_________。
最新回复
(
0
)