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
Renewable Energy Sources Today petroleum provides around 40% of the world’s energy needs, mosdy fuelling automobiles. Coal i
Renewable Energy Sources Today petroleum provides around 40% of the world’s energy needs, mosdy fuelling automobiles. Coal i
admin
2015-07-17
118
问题
Renewable Energy Sources
Today petroleum provides around 40% of the world’s energy needs, mosdy 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 over 2,000 years ago. But the first hydroelectric 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,which has just been completed, is the largest ever. At five times the size of the US’s Hoover Dam, its 26 turbines 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 significandy contribute greenhouse gases.
In 2003 , the first commercial power station to harness tidal currents in the open sea opened in Norway. It is designed like windmill,but others take the form of turbines.
As prices fall, wind power has become the fastest growing type of electricity generation— quadrupling 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—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.
Which is the country with the first commercial power station that makes use of ocean currents produced by tides?
选项
A、China.
B、Norway.
C、England.
D、America.
答案
B
解析
文章第三段说2003年挪威首次运营利用潮汐进行发电的商业电站。所以,B是正确选项。
转载请注明原文地址:https://kaotiyun.com/show/lnGd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
WhatisCold?Howcoldiscold?Italldependsonwhoistalking.Tousordinarypeoplenothingintheworldmaybesocoldasfa
BackpacksareconvenientbecauseAccordingtoParagraph4.whatdoesRomeplantodo?
Thusourconvictionisreinforcedthatonlysocialrevolutioncanreallysolvetheproblemsofthepeople.
CollegeSportsintheUSCollegesportsintheUnitedStatesareahugedeal.AlmostallmajorAmericanuniversitieshavef
CollegeSportsintheUSCollegesportsintheUnitedStatesareahugedeal.AlmostallmajorAmericanuniversitieshavef
KnowingthatIhadbeenoutofworknow,theywereunwillingtolendmemoney.
AccurateTimerThesedaystimeiseverything.Betweenmeetingsandappointments,deadlinesandconferencecalls,myschedule
FirstImage-recognitionSoftware1Dartmouthresearchersandtheircolleagueshavecreatedanartificialintelligencesoftwaret
HaveYouFilledUpTheForm?Ofallthingsintheworld,Imostdislikefillingupforms.Infact,Ihavea【51】horrorofit
Yourdogneedsatleast20minutesofvigorousexerciseeveryday.
随机试题
依知识产权的地域性,下列说法正确的有()
巴贝奇特别强调劳资协作,提出了固定工资加利润分享制度,以调动劳动者的工作积极性。
宣传具有如下特性:(1)_________。(2)_________。(3)_________。
科学管理理论着重研究的是()
Somepeopleworryaboutmycollectingofthosefascinatingbirdsandanimalsthattheypaytoseeinthezoo.Oneofthequestio
直接利用专家们的知识和经验,提出决策目标及方法,并进行评价和选择的方法是()。
时间点零表示资金运动的时间始点或某一基准时刻,是指日历年度的年初。()
在整理手工会计业务时,重新核对各类凭证和账簿,要求做到()相符。
德意志诗人诺瓦利斯(1772--1801年)认为,哲学是全部科学之母,科学的发展又会推动哲学的进步。他能够举出的最佳论据是()。
设证明:f(x,y)在点(0,0)处连续且可偏导,并求出fx(0,0)和fy(00)的值.
最新回复
(
0
)