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
The energy which the sun radiates goes in every direction , and only a minute part of it falls on the earth. Even so, it represe
The energy which the sun radiates goes in every direction , and only a minute part of it falls on the earth. Even so, it represe
admin
2010-07-11
78
问题
The energy which the sun radiates goes in every direction , and only a minute part of it falls on the earth. Even so, it represents power of about 5 , 000, 000 horsepower(马力)per square mile per day: the sun gives us as much energy every minute as mankind utilizes in a year. At present, we use this energy indirectly, and it is our final source of power. Coal represents the chemical action of the sun on green plants thousands of years ago. Waterpower results from the rain formed by vapor which comes from the evaporation of water under the sunshine. Even windmills operate because of air currents set in motion by the different heating effects of the sun in different places. Some day, through chemistry or some type of solar engine, we shall harness this great source of energy more directly. Already a scientist has worked out an engine, surprisingly efficient, in which the sun’s rays are concentrated through mirrors on a tube of water to create steam.
This passage centers mainly on______.
选项
A、harnessing energy through chemistry
B、our last source of power
C、how water power is produced
D、the amount of solar energy that can be utilized
答案
B
解析
归纳大意题。本题问本文主要围绕……(来写)的。从诸选项来看,A/C/D都仅仅涉及文章内容的一部分,无法概括全文,只有选项B能够概括全文,故选B。我们的最终能源。
转载请注明原文地址:https://kaotiyun.com/show/bALC777K
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
TherewasthePuritan(清教徒)beliefinthevirtueofwork,bothforitsownsakeandbecausetherewardsitbroughtwereregarded
Therearemanyproblemsinourmodernworld.Oneveryseriousproblemisenergy.Wegetagreat【71】ofenergyweneedfromcoal
Therearemanyproblemsinourmodernworld.Oneveryseriousproblemisenergy.Wegetagreat【71】ofenergyweneedfromcoal
Banksarenotordinarilypreparedtopayoutallaccounts:theyrelyondepositors(储户)nottodemandpaymentallatthesametime
Banksarenotordinarilypreparedtopayoutallaccounts:theyrelyondepositors(储户)nottodemandpaymentallatthesametime
Banksarenotordinarilypreparedtopayoutallaccounts:theyrelyondepositors(储户)nottodemandpaymentallatthesametime
Allthehousewivesthatwenttothenewsupermarkethadonegreatambition:tobetheluckycustomerwhodidnothavetopayfor
Allthehousewivesthatwenttothenewsupermarkethadonegreatambition:tobetheluckycustomerwhodidnothavetopayfor
Hadyoupreparedforyourlecture,you______morefluently.
Mycousindemandedthatshe______accompanymetothedoctor.
随机试题
内伤头痛的特征可有
合成VIDL的场所主要是在
下列哪项不是闭经与痛经的共同病机
建设工程合同包含多个专业工程时,(),负责该工程施工管理文件签章。
学校的中心工作是()
大凡爱书的人每得一种新书,在诵读赏玩之余,总不免要随手写上一些有关该书的话题。这种文字可能也就是后世所谓书话的发端。但较之于传统的题跋,现在的书话在写法上大多更侧重于对书的内容、义理的品评、阐发,这也是势所必然,因为传统题跋中的某些重要话题,如版本等,对于
唐代是我国古典诗歌发展的全盛时期,是我国优秀的文学遗产之一,也是全世界文学宝库中的一颗灿烂的明珠。300年间,诗才辈出,作品繁多,题材广泛,形式多样,风格各异。唐诗的形式是多种多样的。唐代的古体诗,基本上五言和七言两种。近体诗也有两种,一种叫作绝句,一种叫
函数y=f(x,y)在点(x0,y0)处连续是它在该点偏导数存在的()
在软件开发中,需求分析阶段产生的主要文档是
A、ItbroughtBarryalotofcompliments.B、Itmadetheworkingsystemworsethanbefore.C、Itensuredthenormalworkofthesta
最新回复
(
0
)