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
Energy from the Sun Everyone needs and uses energy. If there were no energy,【46】 Most of the energy on this planet comes
Energy from the Sun Everyone needs and uses energy. If there were no energy,【46】 Most of the energy on this planet comes
admin
2011-01-01
52
问题
Energy from the Sun
Everyone needs and uses energy. If there were no energy,【46】
Most of the energy on this planet comes from the sun, but people do not receive that energy directly. It comes from different sources and in different forms.
Green plants convert the sun’s energy to food energy that animals and people use for life. The energy from animals has been used for hundreds of years to operate farm equipment and to pull carts, wagons , and other vehicles.
The sun’s energy takes water from rivers, lakes, and oceans and【47】When rain or snow falls on the land some of it flows into rivers and streams. This flowing water can be used to【48】Water can also be converted (更换) to steam, which produces energy to operate machines.
Winds also come from solar energy. Air that has been heated by the sun rises and creates winds. The process of winds has moved ships on the sea, ground grain, and brought water to the earth.
There is also solar energy in wood, oil, and coal. These fuels have been【49】People burn them to produce heat and to create power for machines. Oil and coal are used to produce electrical energy, too. And electricity produces light heat, and sound energy. In addition, electric power operates (操作) many kinds of equipment, tools, and machines, which make work easier.
If you made a list of all the jobs performed by the different kinds of energy, you would fill many pages . The need for power increases every day, and some sources of energy【50】So scientists and technicians are trying to find new ways to produce power.
A. formed over many centuries from plants.
B. returns it to the earth in the form of rain or snow.
C. are being used up very quickly.
D. there would be no life.
E. produce mechanical energy and electricity.
F. are being produced everyday.
选项
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/2rFd777K
本试题收录于:
职称英语综合类B级题库职称英语分类
0
职称英语综合类B级
职称英语
相关试题推荐
Mergethefollowingtwoshortsentencesintoonenewsentence.
AtheenergytoturnaturbineBimpermeablerockConeortwoseparatorsDturbineoperatorElittleornowaterFhotsprings
TheeconomycontinuedtoexhibitsignsofdeclineinSeptember.
HowDidSheConquertheAmericans?African-AmericantalkshowqueenOprahWinfreyistheworld’smostpowerfulcelebrity,acc
AprofoundchangeseemstohavetakenplaceintheeconomicrelationshipbetweenAmericansandtheiranimals.In1993,thepetb
Howlongdidtheauthorwanderaboutinthestreetsbeforehestoppedunderabridge?Theretiredarmyofficersgavehimmoney
Theseareourmotivesfordoingit.
PetitionsPetitions(请愿/书)havelongbeenapartofBritishpoliticallife.Anyonewhowantedtochangesomethingwouldget
IfImadeamistake,Iwilltrytoremedyit.
随机试题
对于日益“水涨船高”的家庭教育期望,不能________地用“对错”“高低”去评判。父母、孩子和教师三方应坐下,共同溯源和分析家庭教育期望的形成是否合理,这个过程本身就有助于家长理性地反思期望,有助于孩子正面理解期望,也有助于教师充分了解期望并获得亲子双方
按设计图示尺寸以钢材重量计算,不扣除孔眼、切边、切肢的重量,焊条、铆钉、螺栓等重量不另增加的金属结构工程有()。
背景资料:某项目建设单位与A公司签订了氢气压缩机厂房建筑及机电工程施工总承包合同。工程包括:设备及钢结构厂房基础,配电室建筑施工,厂房钢结构制造、安装。一台20t通用桥式起重机安装,一台活塞式氢气压缩机及配套设备。氢气管道和自动化仪表控制装置安装
一是要能提出多个不同的技术方案,二是要对不同的技术方案进行技术经济分析。这两项工作是()的关键。
在下列财务内部收益率的表述中,项目财务评价可行的条件是( )。
预先危险性分析需要对危险源进行危险分级,找出应重点控制的危险源,其中Ⅱ级对应的是()。
用股票购买资产的收购方式又叫“换股”。( )
下列有关利率的说法,错误的是()。
下列选项中不属于软件生命周期开发阶段任务的是
Practicegetsarawdealinthefieldofappliedlinguistics.Mostlay-peoplesimplyassumesthatpracticeisanecessaryconditi
最新回复
(
0
)