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(石油)provides around 40% of the world’s energy needs, mostly fuelling automobiles. Co
Renewable Energy Sources Today petroleum(石油)provides around 40% of the world’s energy needs, mostly fuelling automobiles. Co
admin
2016-07-17
26
问题
Renewable Energy Sources
Today petroleum(石油)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(矿物燃料). Natural gas reserves could fill 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. Less-polluting renewable energy sources offer a more practical long-term energy solution. " Renewable" refers to the fact that these resources are not used faster than they can be replaced.
Hydroelectric(水力发电的)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 U. S. ’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.
In 2003, the first commercial power station to use tidal(潮汐的)currents in the open sea opened in Norway. It is designed like windmill(风车), but others take the form of turbines.
As prices fall, wind power has become the fastest growing type of electricity generation— quadrupling(翻两番)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 harmless—they can interfere with radar, alter climate and kill sea birds. Scotland is building Europe’s largest wind farm, which will power 200, 000 homes. The U. K. ’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.
One of the problems with wind farms is that______.
选项
A、there is not enough wind
B、wind is not reliable
C、they can only be built on the sea
D、they might influence the world economy
答案
B
解析
文章最后一句话指出英国到2020年五分之一的电力来自风力发电的目标会产生问题,因为风是不稳定、不可靠的(unreliable),本题正确答案为B。
转载请注明原文地址:https://kaotiyun.com/show/OxQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Peoplearoundtheglobehittheheightoftheirmiseryanddepressionin(51)age,anewinternationalstudysuggests.The
Acupofwholemilkprovidesroughlyonehundredsixty-sixcaloriesofenergy.
HitchhikingWhenIwasinmyteens(十几岁)and20s,hitchhikingwasamainformoflong-distancetransport.Thekindnessorcu
Earthquake1Everyyearearthquakesareresponsibleforalargenumberofdeathsandavastamountofdestructioninvariouspar
Inthebeginningofparagraphonewearetoldthatscientistscannotagree______.WhatdoesFeinbergmeanbysaying"Iwouldt
MiddleAge:ALowPointforMostPeoplearoundtheglobehittheheightoftheirmiseryanddepressioninmiddle【51】______,
MiddleAge:ALowPointforMostPeoplearoundtheglobehittheheightoftheirmiseryanddepressioninmiddle【51】______,
MiddleAge:ALowPointforMostPeoplearoundtheglobehittheheightoftheirmiseryanddepressioninmiddle【51】______,
MiddleAge:ALowPointforMostPeoplearoundtheglobehittheheightoftheirmiseryanddepressioninmiddle【51】______,
随机试题
时间即是生命。我们的生命是一分秒地在消耗着,我们平常不大觉得,细想起来实在值得警惕。我们每天有许多的零碎时间于不知不觉中浪费掉了。我们若能养成一种利用闲暇的习惯,一遇空闲,无论其为多么短暂,都利用之做一点有益身心之事,则积少成多终必有成。常听人讲起“消遣”
经济学分析中所说的短期是指
语音震颤减弱或消失主要见于【】
A.丙酮酸激酶B.丙酮酸羧化酶C.苹果酸酶D.磷酸烯醇式丙酮酸羧激酶催化反应的底物或产物中都没有CO2的是
采血室、成分分离室空气细菌菌落总数检查,检查频次和标准是
A.肺动脉栓塞B.肺部感染C.肺部肿瘤D.肺水肿E.肺气肿肺通气/灌注显像不“匹配”,即局部通气正常,灌注缺损,考虑可能为
高考过后,同学们都在思考以后的发展,比如报考什么大学,选择什么专业等,而璐璐则看上去很轻松,他说这些父母都替他规划好了,只要听父母的就没错,璐璐的情况属于()。
设总体x的概率分布如下从总体中抽取n个简单随机样本,N1表示n个样本中取到-1的个数,N2表示n个样本中取到0的个数,N3表示n个样本中取到1的个数,则N1与N2的相关系数为()
若有以下定义:structlink{intdata;strnctlink*next;}a,b,c,*p,*q;且变量a和b之间已有如下图所示的链表结构:指针p指向变量a,q指向变量c。则能够
Whatwillthemandointhemorning?
最新回复
(
0
)