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
29
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
E
解析
转载请注明原文地址:https://jikaoti.com/ti/bVmsFFFM
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
HowDidSheConquertheAmericans?African-AmericantalkshowqueenOprahWinfreyistheworld’smostpowerfulcelebrity,a
ThetiesymbolizesallofthefollowingexceptWhobroughttheFrenchmen’sneckweartoBritain?
Sheperseveredinherideasdespiteobviousobjectionsraisedbyfriends.
Thepassageismainlyabout______.Whichofthefollowingcharacteristicsoftheseacucumberseemstofascinatetheauthormos
Scientistsusedtoexploreonthesurfaceoftheocean.(46).Theywanttoknowabouttheoceanwaterandtheplantandanimalli
Scientistsusedtoexploreonthesurfaceoftheocean.(46).Theywanttoknowabouttheoceanwaterandtheplantandanimalli
AmericanImmigrantsThepercentageofimmigrants(includingthoseunlawfullypresent)intheUnitedstateshasbeencreepin
MotherNatureShowsHerStrengthTornadoes(龙卷风)andheavythunderstormsmovedacrosstheGreatLakesandintoTrumbullCount
Theeternalmotionofthestarsfascinatedhim.
Thesearetheirmotivesfordoingit.
随机试题
学生的基本权利有哪些?
某企业利用社会上的现有资源,实现组织内在核心优势与外部资源优势动态有机结合,具备了敏捷性和快速应变能力。该企业的组织结构形式是()
L是沿y=1-|1-x|从点O(0,0)到点B(2,0)的折线段,则曲线积分∫L(x2+y2)dx-(x2-y2)dy=()
Thebuyersaskthesellerstosendthemnewones.
一女性病人因不孕症、闭经伴厌食、消瘦就诊。妇科做了各种常规检查后,决定行腹腔镜检查,通知患者准备。患者不知该检查如何做,便随医生进入处置室检查,检查中发现做了切口。患者及家属均不满意手术,向院方提出赔偿要求。行腹腔镜检查如何决定为合理
关于钢筋混凝土柱的受力特点和配筋要求,下列说法错误的是()。
目前世界范围内,最普遍和最基本的教学组织形式是()
下列关于HIV的说法正确的是()。
下列属于实践性民事法律行为的是
______是指信息沿输入通路进入系统,同时由外部形式变换成内部形式,进入系统的信息通过变换中心,经加工处理后再沿输出通路变换成外部形式离开软件结构。
最新回复
(
0
)