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
27
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
Whichofthefollowingdoesn’tbelongtoBeatGenerationworks?A、TheCatcherin
Whatdodietingandenergypolicyhaveincommon?TheSnackWelleffect.The
WhichofthefollowingisNathanielHawthorne’smostnoteworthynovelinthewor
( )是满族中最亲密的大礼,常用于至亲的人久别重逢、重要宾客前来或重要的外交场
外周血中嗜酸性粒细胞增高见于A.流行性腮腺炎感染期B.百日咳感染期C.传染性单核
古代阴阳五行说以青龙、白虎、朱雀、玄武四种动物象征神,青龙为()之神。A.北方
财富管理业务是为高端个人客户提供财富管理服务,包括()。A.经营性贷款 B.
静脉滴注速度过快可能发生“红人综合症”的药品是A.夫西地酸 B.磷霉素 C.
釉基质形成时矿物质占有A.40% B.30% C.50% D.20% E
下列各项中,属于在我国境内销售服务的有()。A.法国航空公司将中国公民赵某从法
最新回复
(
0
)