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
48
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
Sinceabout1800,nearthebeginningoftheindustrialrevolution,coal,petroleumandgashavebeenusedatarapidlyincreasin
8TherearesomanypeopleinChinathatwecannotbut______.(实行计划生育)
Childrenlearnalmostnothingfromtelevision,andthemoretheywatchthelesstheyremember.Theyregardtelevisionpurely【C1】
A、They’vemetbefore.B、Hedoesnotrememberher.C、Sheshouldagreewithhim.D、Theyhavenevermetbefore.A事实状况题。男士说We’vebee
Themodernworldcouldnotoperatewithoutroads.Itisawayoflifewithalmosteveryfamilyinthewesternworldowningan
A、Two.B、Four.C、Eight.D、Twelve.B题目询问男士还要复习几个单元。关键是听到“考试内容为全部的12个单元”和“我以为只包括前面的2/3”,可判断选项B(4个单元)正确。
Highinterestratesusually______peoplefromborrowingmoneyfromthebank.
LandfillsYouhavejustfinishedyourmealatafastfoodrestaurantandyouthrowyouruneatenfood,foodwrappers,drinkc
______(我们已经习惯了金钱就是成功的观念)thattheverythoughtofquittingapromisingcareerseemsfoolish.
A、Ecologists.B、Industrialists.C、Businessmen.D、Environmentalists.B选项均为职业身份的名词表明,本题针对某类人提问。短文最后提到,自然资源保护论者认为应限制技术的增长,由此可推断出,in
随机试题
边滩沉积物以砂岩为主,分选好,夹有少量的砾石和粉砂,()沉积物较粗,上部沉积物较细。
“假如我是一只鸟,/我也应该用嘶哑的喉咙歌唱”出自()
谈判信息的传递场合:
横结肠左侧与降结肠的移行部称
建设项目绩效审计中,对建设项目管理功能的审查与评价主要包括()的审查与评价。
从长期偿债能力来讲,有形资产净值债务率越低越好。()
合作是新形势下实现共同发展的必由之路。惟有合作,我们才能_______彼此分歧;惟有合作,我们才能不断_______共同利益;惟有合作,我们才能有效应对各种挑战,_______共赢的彼岸。填入画横线部分最恰当的一项是()。
20世纪50年代末60年代初,毛泽东在总结“大跃进”以来我国社会主义建设经验教训的基础上进行探索,提出的一系列观点主要是
A、2π∫12f(r)drB、2π[∫12f(r)dr-∫01f(r)dr]C、2π∫12rf(r2)drD、2π[∫02rf(r2)dr-∫01rf(r2)dr]A
Helloeveryone.Thisisthecaptain(机长)speaking.【11】______toFlightJK900leavingforChicago.Ourflighttimetodayis
最新回复
(
0
)