首页
登录
职称英语
[originaltext] Are electric cars the wave of the future? Automobile manufact
[originaltext] Are electric cars the wave of the future? Automobile manufact
游客
2024-02-25
29
管理
问题
Are electric cars the wave 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 2000, 10% of new car sales in the state be so-called "zero emission vehicles". These cars must put no pollution, whatsoever, in the atmosphere.
California is a huge market for the automobile companies. So they are working hard to meet the standards. So far, the electric car seems to be the best alternative. So the big advantage of the electric cars is that they don’t pollute. However, there will be a 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 weigh 400 kilograms and they provide enough energy to go 250 kilometers before recharging, which takes 8 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 the electric cars’ batteries besides the motor, headlights, air-conditioning or heater, its already limited range would 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
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3481408.html
相关试题推荐
[originaltext]Thailandhassomespecialcustomsandhabits.Menendwom
[originaltext]Thailandhassomespecialcustomsandhabits.Menendwom
[originaltext]Thailandhassomespecialcustomsandhabits.Menendwom
[originaltext]M:Goodafternoon.W:Goodafternoon.ThisistheHotelBookingS
[originaltext]W:Longtimenosee!Whathaveyoubeenuptolately?M:Nogood,
[originaltext]W:Longtimenosee!Whathaveyoubeenuptolately?M:Nogood,
[originaltext]Insocietiesinwhichindividualschoosetheirownpartners,
[originaltext]Therehavealwaysbeendisabledchildren.Longbefore,people
[originaltext]Therehavealwaysbeendisabledchildren.Longbefore,people
[originaltext]W:Hi,Larry,areyouwaitingtoseeProf.Jameson,too?M:Yeah,
随机试题
平面图所示的两个建筑从上至下分别是( )。 A.赖特设计的流水别墅和密斯·范
A. B. C. D.
央行采取降低准备金率政策,其政策效应是( )。A.商业银行体系创造派生存款的能
用分段沉淀法分离三萜皂苷的主要依据是混合物中各组分A.极性不同B.基本骨架不同C
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
材料在自然状态下单位体积所具有的质量称为( )。A.孔隙率 B.空隙率 C
在证券市场上,投机者的投机活动是具有双重作用的活动,它有积极意义,也有消极意义,
以下属于期货价差套利种类的有( )。A.跨期套利 B.跨品种套利 C.跨市
根据折算标准的不同,汇率的标价方法可分为()。A.直接标价法 B.美元标价法
男,60岁,有慢性支气管炎病史,患肺心病10年,发现高血压5年。突然出现气急、大
最新回复
(
0
)