首页
登录
职称英语
[originaltext] Three-fourths of the world is covered with water. But only ab
[originaltext] Three-fourths of the world is covered with water. But only ab
游客
2024-02-09
21
管理
问题
Three-fourths of the world is covered with water. But only about 3% of it is fresh. All the rest is salt water, which fills the oceans and seas. In the history, men have tried to build their homes near the sources of fresh water. Now, fresh water is becoming rare, but more and more is needed because of the increasing number of people. Some industries also use large amounts of fresh water in the production of steel, paper, and so on. Scientists estimate that the need of fresh water will have doubled by the year 2050. If it is the truth, we must find new ways of saving or producing it. Some nations have worked on the problem and are already sharing their information with others. They are trying to keep their rivers from being polluted. Deep wells are also being dug, and rainwater is being collected in huge artificial lakes. In one way or another, they hope to provide enough water to satisfy the needs of their people. One important way to have fresh water is to make it from seawater. In this process, the salty seawater is heated, leaving the salt. When the vapor(蒸汽)cools down, it becomes water again. The great problem in desalting is not whether it works, but how much it costs. Building the plants is costly and so are the equipment and fuel for the process. One solution to the problem of the fresh water may be to construct companies with two purposes, that is, making fresh water and generating electricity.
16. Where did men usually build their houses in history?
17. How can scientists provide more fresh water for people?
18. What is the main problem in desalting water?
选项
A、It costs too much.
B、Its process doesn’t work yet.
C、Seawater is too scarce.
D、Seawater can’t be processed.
答案
A
解析
事实细节题。短文最后提到,脱盐过程中遇到的问题不是能否达到效果,而是建工厂、买设备和燃料的成本太高。
转载请注明原文地址:https://tihaiku.com/zcyy/3435051.html
相关试题推荐
[originaltext]MoreandmorepeopleareimmigratingintotheUnitedStates.
[originaltext]Insomecountriescertainkindsofinsurancearecompulsory.
[originaltext]Insomecountriescertainkindsofinsurancearecompulsory.
[originaltext]Penurywaswhatpeoplecalledamysteryman.Wehadknownhim
[originaltext]M:Whatkindofprintsthatarepopularamongteenagers?Whichco
[originaltext]M:Whatkindofprintsthatarepopularamongteenagers?Whichco
[originaltext]M:Whatkindofprintsthatarepopularamongteenagers?Whichco
[originaltext]M:Hi,Sarah,what’sup?W:Oh,hi.Ijustgotoutofahistoryc
[originaltext]M:Hi,Sarah,what’sup?W:Oh,hi.Ijustgotoutofahistoryc
[originaltext]M:Sally,howareyougettingalongwiththetranslationwork?W
随机试题
Theroomisinaterriblemess;it______(can’tclean).can’thavebeencleaned情
Thenightisnotwhatitwas.Once,theearthwascasthalfinshadow.Then
直接影响人的活动效率,使活动得以顺利进行的个性心理特征称为()A.人格 B.
A.P(S4)和V(S5) B.V(S5)和P(S4) C.V(S4)和P(
在项目管理中,成本绩效分析应该包括发现成本差异为负的工作包,或者说低于以下哪项的
碳化深度值测量时,使用适当的工具在测区表面形成深度大于混凝土碳化深度的洞。采用一
下列关于主要评估资料的相关说法中,错误的是( )。A.对权属资料不完备、毁损、
人们为了保证学校中教育活动顺利进行而创立和形成的一种特有的文化是( )。A.校
A.龟板B.龙骨C.鳖甲D.牡蛎E.代赭石具有平肝潜阳、软坚散结、收敛固涩功效的
(2020年真题)下列交通安全设施中,能起诱导视线作用的有()。A.轮廓标 B
最新回复
(
0
)