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
2023-07-19
59
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. (26) 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. (27)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. (28)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.
26. Where did men usually build their houses in history?
27. How can scientists provide more fresh water for people?
28. 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/2851139.html
相关试题推荐
[originaltext]WiltChamberlainisretirednow.Heusedtobeafamousbaske
[originaltext]WiltChamberlainisretirednow.Heusedtobeafamousbaske
[originaltext]Morethanthree-millionpeoplediedofAIDSlastyear.Thee
[originaltext]Morethanthree-millionpeoplediedofAIDSlastyear.Thee
[originaltext]M:Hey,Jane.What’ssointeresting?W:What?Oh,hi,Tom.I’m
[originaltext]W:Didyourpicturesofthenightviewcomeout?M:ActuallyIra
[originaltext]W:Didyourpicturesofthenightviewcomeout?M:ActuallyIra
[originaltext]W:Didyourpicturesofthenightviewcomeout?M:ActuallyIra
[originaltext]W:Didyourpicturesofthenightviewcomeout?M:ActuallyIra
[originaltext]W:Didyourpicturesofthenightviewcomeout?M:ActuallyIra
随机试题
ReadtheadvertisementsbelowandanswerQuestions8-14.ASTEADMAN&COCHARTE
Whatrecommendationsdoesthetutormakeaboutthereferencebooks?AAllB
Nowwhicharetheanimalsreallytobepitiedincaptivity?First,thosecle
TheNewBusinessModelsA)Mostemergingcountriesarefo
下列各项中,不属于单位、个人和银行办理支付结算业务时必须遵守的原则的有()。A.
软件质量保证的主要目标不包括()A.通过预防、检查与改进来保证软件质量 B.
A.每日尿量<300ml B.每日尿量<100ml C.每日尿量<200ml
对蜜丸丸条质量不正确的论述是A.粗细适当 B.表面光滑 C.长短一致
下列哪一种辅因子的生成可通过测定340nm处吸光度的增加来表示A.FADHB.N
以下关于热水采暖系统形式特点的描述,正确的有()。A.重力循环单管上供下回式升
最新回复
(
0
)