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, mostly fuelling automobiles. Coal is
Renewable Energy Sources Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is
admin
2012-12-03
49
问题
Renewable Energy Sources
Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in pover 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.
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.
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 lilling sea birds. Migrating birds may have more luck avoiding them. Scotland is building europe’s largest wind farm, which wil power 200,000 homes. The UK’s goal is to generate onefifth of power from renewable sources, mainly wind, by 2020. But this may cause problems, because wind is unreliable.
According to the passage,resources like wind are
选项
A、renewable.
B、recyclable.
C、damaging.
D、scarce.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/IYQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
ABiologicalClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalcloc
Babiescanlearnevenintheirsleep.Thestudyshowsthattheinfants’cerebralcortexstopsworkingwhileheisasleep.
CellPhones:HangUporKeepTalking?Millionsofpeopleareusingcellphonestoday.Inmanyplacesitisactuallyconsider
TheWorker’sRoleinManagementTraditionally,ithasbeentheworkers’roletoworkandmanagement’sroletomanage.Mana
A.havehealingeffectsB.beusedexternallyC.bepromotedD.helpthedisabledE.befurtherexploredF.suitdifferentpeopl
EveryDogHasItsSayKimikoFukuda,aJapanesegirl,alwayswonderedwhatherdogwastryingtosay.Wheneversheputonmake
SomesleepdrugsdomorethanmakeyousleepTheUnitedStatesFoodandDrugAdministration(美国食品及药品管理局)hasorderedcompani
Accordingtothepassage,MountUnzenAccordingtothepassage,thestudyoftheMountUnzenvolcanomaybenefitJapaninallt
Whenshewasinvitedtodinner,shereadilyaccepted.
随机试题
甲公司应收乙公司货款800万元,乙公司因发生财务困难,到期无法按约定偿还债务。经磋商,双方同意按600万元结清该笔货款。甲公司已经为该笔应收账款计提了100万元的坏账准备,在债务重组日,该事项对甲公司和乙公司的影响分别为()。
门诊体格检查可能发现下列哪种辅助检查能更好地评价甲亢
眩晕病因除肝阳上亢、肾精不足外,还有四种;下列哪项不是眩晕病因
炎症反应的中心环节是
眩晕的发生.与下列哪些脏腑功能失调密切相关( )。
在同一信道上同一时刻,能够进行双向数据传输的通信方式是()。
投资者因冒风险进行投资,所获得超过时间价值的那部分额外报酬称为()。
经过30多年的发展,我国已经成为经济大国,但还不是经济强国。这是因为()
Inmanycountrieswomenareallowedtotakematernityleavefromtheirjobsduringthefirstmonthsafterthebirthoftheirbab
Self-discipline:theFoundationofProductiveLivingI.Issuestobenoticedatthethoughtofself-disciplineA.Troublesfors
最新回复
(
0
)