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
Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in powe
Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in powe
admin
2012-08-10
66
问题
Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in power stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel. Natural gas reserves could plug some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. We could fast reach an energy crisis. We need to rapidly develop sustainable solutions to fuel our future. Less-polluting renewable energy sources offer a more practical long-term energy solution. They may benefit the world’s poor too. "Renewable" refers to the fact that these resources are not used faster than they can be replaced.
The Chinese and Romans used watermills (水利磨粉机) over 2,000 years ago. But the first hydroelectric (水电的) dam was built in England in 1870. Hydroelectric power is now the most common form of renewable energy, supplying around 20% of world electricity. China’s Three Gorges Dam is the largest ever. At five times the size of the US’s Hoover Dam, its 26 turbines (涡轮机) will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China’s entire electricity demand. Surprisingly, some argue that hydroelectric dams significantly contribute greenhouse gases.
In 2003, the first commercial power station to harness tidal currents (潮汐)in the open sea opened in Norway. It is designed like windmills, but others take the form of turbines.
As prices fall, wind power has become the fastest growing type of electricity generation — quadrupling (变成四倍) worldwide between 1999 and 2005. Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the world’s entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally benign (无害的) — they can interfere with radar and leave a significant ecological footprint, altering climate and killing sea birds. Migrating birds may have more luck avoiding them. Scotland is building Europe’s largest wind farm, which will power 200,000 homes. The UK’s goal is to generate one-fifth of power from renewable sources, mainly wind, by 2020. But this may cause problems, because wind is unreliable.
What are the energy resources that are not renewable according to the article?
选项
A、Petroleum and coal.
B、Natural gas.
C、Wind and water.
D、A and B.
答案
D
解析
可定位在第1段。文中提到石油(petroleum)、煤(coal)和天然气(natural gas)这三种不可再生资源,大多数专家预测这些燃料将于50年内耗尽,所以需要开发再生能源(renewable resources),而文章后几段探讨的是水能(water)和风能(wind),故D是正确选项。
转载请注明原文地址:https://kaotiyun.com/show/C857777K
0
大学英语四级
相关试题推荐
A、Writingpapersforhisclasses.B、Meetingwithhisprofessors.C、Doingextraworkinthechemistrylab.D、Workingovertimeas
OverviewLikemanypeople,youmayexperiencecabinfeverduringthewintermonths.Or,youmaytendtoeatmoreandsleepm
Withoutthattemporaryworking-site,thestudent__________(不可能按时完成设计).
A、Thecitycanbealonelyplace.B、Lifeinthewestcanbeverydangerous.C、Peopleinthewestarefondofanimals.D、Thedog
A、Hethinksthecityistoocrowded.B、Helikestheplaceverymuch.C、Hethinksthestreetsaretoonarrow.D、Headmirestheco
A、Readingnewspaper.B、Writingdocuments.C、Talkingaboutanimals.D、WatchingTV.D题目询问说话者在做什么。关键是听到女士的问话“新闻之后演什么”,可判断选项D(看电视)正确
ForAmericans,timeismoney.Theysay,"Youonlygetsomuchtimeinthislife;you’dbetteruseitwisely."The【B1】______will
Historyinstructsustobeawareofourcircumstancesandacceptourcircumstancesnomatterhowdifficult.Historyoffersusan
It’seasiertoadapttonewsituationsifonehasa______attitude.
LandfillsYouhavejustfinishedyourmealatafastfoodrestaurantandyouthrowyouruneatenfood,foodwrappers,drinkc
随机试题
文字块(Word)(写出定义、与文本的关系以及操作原则)
患者和患者授权人在手术前签《手术中快速活检患者知情同意书》的目的是
无黏性土的分类是按()
工程项目管理的核心任务是项目的()。
社会策划模式一方面强调过程的理性化,另一方面强调()。
下列有关执法为民的做法,不正确的是()。
西红柿:番茄
某种测验可以随时在网络上报名参加,某人通过这种测验的概率是.若他连续两次参加测验,则其中恰有一次通过的概率是[].
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
ThedoctorsaidIwasover-weight.IfonlyI______less!
最新回复
(
0
)