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
If the sun has enough power to warm and light the whole earth, it must have enough power to do other things, too.【61】Can we use
If the sun has enough power to warm and light the whole earth, it must have enough power to do other things, too.【61】Can we use
admin
2010-06-30
85
问题
If the sun has enough power to warm and light the whole earth, it must have enough power to do other things, too.【61】
Can we use the sun’s aboundant energy to supply electricity, or at least to perform the functions which electricity or other types of power usually perform? The answer is yes.
【62】
For example people have for many years been using the reflected heat of the sun to cook by. Solar cookers have been built with several curved mirrors reflecting the sun and focusing its heat on the cooking element.
This apparatus can be used just like a gas or electric stove; it is more expensive to make but it does not need any fuel, and so costs nothing to use. Another possibility of using solar energy is in househeating.
【63】
The form of energy we use most is electricity , and every day more is needed. But electricity has to be made, too, and to make it huge quantities of fuel are required--oil, coal, gas and nowadays even uranium.
The question which worries everyone today is: how long will these fuels last? 【64】
Nobody knows for sure, but most experts think it will soon be difficult to obtain sufficient electricity from these sources. It is possible that the sun can make a contribution here, too.
【65】
Solar power has already been used to produce terrific heat. In Southern France a solar furnace has been built, where temperatures reach more than 3000°Centigrade.
This furnace is only used for experiments at present, but could be used to produce steam for a power station.
So it is possible that one day in the near future we will depend on solar furnaces and power stations to provide our electrical needs. Or perhaps each home will have, a solar generator to pro vide power for lighting and heating.
【65】
选项
答案
太阳能已被用来提供极高的温度。在法国南部已建造了一座太阳炉,温度高达摄氏3000度以上。
解析
转载请注明原文地址:https://kaotiyun.com/show/4jJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Oneofthemostalarmingthingsaboutthecrisisintheglobalfinancialsystemisthatthewarningsignshavebeenouttherefo
Intheworldofentertainment,TVtalkshowshaveundoubtedlyfloodedeveryinchofspaceondaytimetelevision.Andanyonewho
Intheworldofentertainment,TVtalkshowshaveundoubtedlyfloodedeveryinchofspaceondaytimetelevision.Andanyonewho
Onlythreestrategiesareavailableforcontrollingcancer:prevention,screeningandtreatment.Lungcancercausesmoredeaths
Onlythreestrategiesareavailableforcontrollingcancer:prevention,screeningandtreatment.Lungcancercausesmoredeaths
Onlythreestrategiesareavailableforcontrollingcancer:prevention,screeningandtreatment.Lungcancercausesmoredeaths
EmilyDickinsonwasanineteenth-centuryAmericanwomanwholivedherlifecompletelyunknowntoanyoneexceptherfamilyanda
EmilyDickinsonwasanineteenth-centuryAmericanwomanwholivedherlifecompletelyunknowntoanyoneexceptherfamilyanda
Generallyspeaking,aBritishiswidelyregardedasaquiet,shyandconservativepersonwhois【21】______onlyamongthosew
随机试题
A.肺癌B.自发性气胸C.支气管扩张D.肺结核E.肺脓肿男性,45岁,吸烟史20年,间断痰中带血3个月,伴消瘦,诊断首先考虑
对于异位妊娠,使用治疗法则:活血化瘀消瘕杀胚的是在
行胃癌根治手术时,胃切断线要求距肿瘤边缘至少
A.小檗碱B.利血平C.伪麻黄碱D.东莨菪碱E.烟碱其盐酸盐不溶于水的是
货物名称不得填写笼统的商品类,必须填写具体的名称,需要时可填写货物的型号、规格或牌号。( )
(2017·江西)为突出教学内容,教师在黑板上用彩色粉笔书写、圈点或画线。这是运用了知觉的()
汉朝颁布的旨在督促官吏及时发觉和缉捕盗贼犯罪的法律是()。
物权的客体是()。
认识过程主要是理性思维的过程,同时又包含非理性因素的参与。理性因素是指人的理性直观、理性思维等能力。理性因素在认识中的作用有()
下面属于应用软件的是
最新回复
(
0
)