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
专升本
Solar energy for your home is coming. It can help you as a single home owner. It can help the whole country as well. Whether or
Solar energy for your home is coming. It can help you as a single home owner. It can help the whole country as well. Whether or
admin
2015-03-13
35
问题
Solar energy for your home is coming. It can help you as a single home owner. It can help the whole country as well. Whether or not solar energy can save your money depends on many things. Where you live is one factor. The type of home you have is another. Things like insulation present energy coasts, and the type of system you buy are added factors.
Using solar energy can help save our precious fuel. As you know, our supplies of oil and gas are very limited. There is just not enough on hand to meet all our future energy needs. And when Mother Nature says that’s all. The only way we can delay hearing those words is by starting to save energy now and by using other sources, like the sun.
We won’t have to worry about the sun’s running out of energy for another several billion years or so. Besides begin an endless source of energy, the use of the sun has other advantages as well. The sun doesn’t offer so many problems as other energy sources. For example, fossil fuel plants add to already high pollution levels. With solar energy, we will still need sources of energy, but we won’t need so much. That means we can cut down on our pollution problems.
With all these good points, why don’t we use more solar power? There are many reasons for this. The biggest reason is money. Until now, it was just not practical for a home owner to put in a solar unit. There were cheaper sources of energy. All that is changing now. Solar costs are starting to equal the costs of oil and electricity. Experts say that gas, oil and electricity prices will continue to rise. The demand for electricity is increasing rapidly. But new power plants will use more gas, oil or coal. Already in some places the supply of electricity is being rationed. Solar energy is now in its infancy. It could soon grow to become a major part of our nation’s energy supply.
The sun is an endless source of energy, it will not run out of it for______.
选项
A、several million years
B、several hundred years
C、several billion years
D、several thousand years
答案
C
解析
文中所说的太阳的寿命是几十亿年。见文章第三段第一句。
转载请注明原文地址:https://kaotiyun.com/show/UqUC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Whetherathomeorinarestaurant,mealsinBrazilaresacred(神圣的):atimetoeat,butalsotosharepreciousmomentswithfa
Whetherathomeorinarestaurant,mealsinBrazilaresacred(神圣的):atimetoeat,butalsotosharepreciousmomentswithfa
Howcanwegetridofgarbage(垃圾)?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimporta
Howcanwegetridofgarbage(垃圾)?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimporta
Howcanwegetridofgarbage(垃圾)?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimporta
Thehotel______60dollarsforasingleroomwithbath.
Timespentinabookshopcanbemostenjoyable,whetheryouarebook-loverormerelyyouaretheretobuyabookasapresent.Y
NotuntilMr.SmithcametoChina______whatkindofcountrysheis.
随机试题
5Gwillcertainlybringsome(total)________newtechnologiestoourlife.
A.支气管哮喘B.肺气肿C.声带麻痹D.自发性气胸E.胸腔积液征双肺散在哮鸣音
A.下唇歪斜B.鼻唇沟变浅C.额纹消失D.伸舌时舌尖偏向患侧E.眼睑闭合不全面神经颧支损伤表现为
治气血亏虚型眩晕的方药是
认证机构对获准认证的供方质量管理体系实施监督管理,认证有效期为()年。
下列公司信贷产品中,具有自偿性业务特征的是()。
X会计师事务所连续多年负责审计甲公司财务报表。2012年12月甲公司董事会决议变更会计师事务所,改由Y会计师事务所负责审计2012年财务报表。接受委托后,Y事务所在征得甲公司同意的情况下杏阅X事务所的审计工作底稿,X事务所在决定向Y事务所提供工作底稿后,一
以下做法中,()可以有效防止绩效考评可能出现的各种偏误。
将二重积分f(x,y)dxdy=∫1edx∫0lnxf(x,y)dy化为先对x后对y的二次积分,则f(x,y)dxdy=________。
设y=arctanx.求y(n)(0).
最新回复
(
0
)