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
A、Its battery is not powerful enough. B、Its battery is of enormous size. C、It costs too much money. D、It breaks down easily. A短文
A、Its battery is not powerful enough. B、Its battery is of enormous size. C、It costs too much money. D、It breaks down easily. A短文
admin
2017-01-16
31
问题
Are electric cars the way of the future? Automobile manufactures are under pressure to develop cars that do not pollute. One powerful motive is a California law requiring that by the year 2020 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. [24]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. [25] So automobile engineers are trying to make more powerful batteries that would increase the cars’ range and make them more attractive to buyers.
23 Why does the electric car seem to be the best alternative so far?
24 What is the big problem with an electric car?
25 What are the automobile engineers trying to do?
选项
A、Its battery is not powerful enough.
B、Its battery is of enormous size.
C、It costs too much money.
D、It breaks down easily.
答案
A
解析
短文提到,电动汽车一个大问题在于,相对于其所能供应的电能而言,电池的重量偏高。言外之意是,电池的供电能力不够强大,故A正确。
转载请注明原文地址:https://kaotiyun.com/show/EEi7777K
0
大学英语四级
相关试题推荐
Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldstartyouressaywitha
MyfavoriteT.V.show?"TheTwilightZone."I【B1】______liketheepisodecalled"ThePrinter’sDevil."It’saboutanewspape
MyfavoriteT.V.show?"TheTwilightZone."I【B1】______liketheepisodecalled"ThePrinter’sDevil."It’saboutanewspape
A、Interviewerandinterviewee.B、Bossandsecretary.C、Doctorandnurse.D、Doctorandpatient.D医疗健康类,语义理解题。女士问自己有什么问题,男士说情况并不严重
Mostpeoplethinksuccessisagoal.Idonot.Iseesuccessasaprocess.Mostpeople【B1】______successonlyintermsofmoney.
A、Sleepingproblems.B、Stomachproblems.C、Bademotions.D、Highbloodpressure.B短文提到,长期过量喝咖啡会导致胃部和牙齿出现问题。B对应其中一个负面影响,故正确。
A、Theycandevelopintohumanorgan.B、Theyareabletocurecancer.C、Theyhelptorecreatestemcells.D、Theyareabletocrea
A、Ithasnodifferencefromothercells.B、Itcanonlybecomeacertaintypeofcell.C、Itcan’tbecomeakidneycell.D、Itmain
随机试题
《归档文件整理规则》提出的整理方法适用于()
______theadvancesofscience,thediscomfortsofoldagewillnodoubtalwaysbewithus.
关于诊断早期妊娠,下列说法错误的是
男,50岁,血型“A”,有胃溃疡病史10余年,最近胃镜检查怀疑有癌变而入院手术。术前输注“A”型全血约150ml时突然畏寒、寒战,体温38℃,呕吐1次,血压正常。停止输血并经对症处理后症状很快缓解。这种输血不良反应最有可能是
患者女性,38岁。患子宫肌瘤拟行子宫肌瘤切除术,术日晨,护士为其插导尿管,其目的是
【2012专业知识真题上午卷】某小型企业拟新建检修车间、办公附属房屋和10/0.4kV车间变电站各一处,变电所设变压器一台,车间用电负荷及有关参数见下表。请回答以下问题。当采用需要系数计算负荷时,吊车的设备功率与下列哪个数值最接近?()
下列风管安装要求,正确的有()。
为了解决超额累进税费计算复杂的问题,累进税率表中一般规定有( )。
在学习过程中,学生忘记了作为例证的事实与细节,记住的是概括性高的原理,这种遗忘是一种有利的、积极的遗忘。()
CORBA是由OMG组织为解决分布式处理环境中软硬件系统互连而提出的一种解决方案,已经逐渐成为分布计算技术的标准。CORBA标准主要分为三个层次,其中规定业务对象有效协作所需的协议规则的层次是______。
最新回复
(
0
)