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
What is the talk’ mainly about?
What is the talk’ mainly about?
admin
2010-02-17
23
问题
What is the talk’ mainly about?
Are electric cars the way of the future? Automobile manufactures are under pressure to develop ca rs that do not pollute. One powerful motive is a California law requiring that by the year 2000 ten percent of new car sells in the state be so called zero-emission vehicles. These cars must put no pollutants whatsoever into the atmosphere.
California is a huge market for the automobile companies, so they are working hard to meet these standards. So far the electric car seems to be the best alternative. So the big advantage of electric cars is that they don’t pollute. However they will be in competition with gas-powered cars and that’s where the weaknesses come out.
The big problem is that the batteries that power electric cars weigh a lot relative to the amount of power they deliver. For instance, in one prototype electric car, the batteries weighed 400 kilograms. And they provide enough energy to go 250 kilometers before recharging, which takes eight hours. Compare that to a moderately fuel-efficient conventional car, it can go 600 to 700 kilometers on a tank of gas and refilling takes just minutes. If there are other drains on an electric car’s batteries besides the motor, headlights, air conditioning or a heater, its already limited range will be significantly reduced. So automobile engineers are trying to make more powerful batteries that would increase the cars’ range and make them more attractive to buyers.
选项
A、They are cheaper.
B、They do not pollute as much.
C、They are simpler to drive.
D、They are faster.
答案
C
解析
转载请注明原文地址:https://jikaoti.com/ti/wAbMFFFM
0
专业英语四级
相关试题推荐
A、Bigpressureofcareers.B、Theirparentsareaging.C、Theywanttoremarryandblendfamily.D、TheysufferfromAlzheimer’s.A
HotSpotsinCrossCulturalCommunicationI.【T1】________Conversations—Modesofaddress—【T2】______—Levels
PassageThree(1)Mycar’sgearleverdoesmorethandispensetransmissionrations.Itpanderstome.Itcajolesandbeckon
PassageTwoWhywasthereintimacyofshipboardbetweentheMacphailsandtheDavidsons?
Earlychildhoodisatimeoftremendousgrowthacrossallareasofdevelopment,especiallythelanguageskills.Frombirth
Ourshasbecomeasocietyofemployees.AhundredyearsorsoagoonlyoneoutofeveryfiveAmericansatworkwasemployed,i.
AssoonasitwasrevealedthatareporterforProgressivemagazinehaddiscoveredhowtomakeahydrogenbomb,agroupoffirea
Socialdistancemayaffect/howopenlyemployeesspeakabouttheirwork.Peopleofthesamerank/maytalkfranklytooneanot
Arecentstudy,publishedinlastweek’sJournaloftheAmericanMedicalAssociation,offersapictureofhowriskyitistoget
Whatdothespeakersmainlydiscuss?
随机试题
混凝土人仓铺料采用斜层浇筑法时,浇筑块高度一般限制在()左右.
在30/32路PCM系统基群中,一个复帧包含()个子帧。
不属于蒸汽热网返回管内的介质的是()。
作家马某2010年12月从某电视剧制作中心取得剧本使用费50000元。关于马某该项收入计缴个人所得税的下列表述中,正确的是()。
从课程论的视角来看,教室座位的安排、图书角的布置都属于()
简述凯恩斯学派货币政策传导机制理论。
我国《民法通则》第五十四条规定:“民事法律行为是公民或者法人设立、变更、终止民事权利和民事义务的合法行为。”请问:民事法律行为有哪些分类?
设矩阵的特征方程有一个二重根,求a的值,并讨论A是否可相似对角化.
函数f(x)=(x2一x一2)|x3一x|不可导点的个数是()
Thelanguagesoftheworldcanbedividedintoanumberoffamiliesofrelatedlanguages,possiblygroupedintolargerstocks,p
最新回复
(
0
)