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
26
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、By mixing salt water with fresh water.
B、By producing more seawater.
C、By changing salt water into fresh water.
D、By adding certain amount of chemicals.
答案
C
解析
信息明示题。短文在讲科学家希望提供淡水以满足人们的需求时提到,其中一个途径就是从海水中提取淡水。
转载请注明原文地址:https://tihaiku.com/zcyy/2851138.html
相关试题推荐
[originaltext]BelfastisthecapitalofNorthernIrelandandamajorcityinco
[originaltext]Duringthepastdecade,therehasbeenamultifoldincreaseinvi
[originaltext]Tea-drinkingwascommoninChinafornearlyonethousandyearsbe
[originaltext]Tea-drinkingwascommoninChinafornearlyonethousandyearsbe
[originaltext]Tea-drinkingwascommoninChinafornearlyonethousandyearsbe
[originaltext]W:I’mfascinatedwiththem.Ioftenreadthestoriesabouttheir
[originaltext]W:I’mfascinatedwiththem.Ioftenreadthestoriesabouttheir
[originaltext]W:I’mfascinatedwiththem.Ioftenreadthestoriesabouttheir
[originaltext]W:I’llmakeyourflightreservationsbyphonenowandthenwrite
[originaltext]W:I’llmakeyourflightreservationsbyphonenowandthenwrite
随机试题
说明:假如你是某大学外语系主任李明,你系的老师张强要调至别的学校担任英语老师,根据以下信息,为他写一封推荐信:1.写推荐信的原因2.张强的工作能
Coca-Colahasalwaysbeenmorefocusedonitseconomicbottomlinethanong
[originaltext]W:Goodeveningandwelcometotonight’sprogram.OurguestisDr
Manytreesandshrubschangecolorinfall.Threefactorsinfluencefall’sc
Recurrenteducationisinstructionformenandwomenwhonolongergotosch
以下关于文档测试的叙述中,不正确的是()。A.文档要面向所有级别读者 B.文
A.160 B.120 C.100 D.140
简述现代企业人力资源管理各个历史发展阶段的特点。
毛泽东所著《湖南农民运动考察报告》的主要内容有()。A.充分估计了农民在中国革命
马克思主义认为,造就全面发展的人的唯一途径和方法是()。 A.教育与生产劳动
最新回复
(
0
)