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
A、It costs too much. B、Its process doesn’t work yet. C、The salt cannot be removed totally. D、Seawater can’t be processed. A短文最后提
A、It costs too much. B、Its process doesn’t work yet. C、The salt cannot be removed totally. D、Seawater can’t be processed. A短文最后提
admin
2022-11-07
65
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 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 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 humans usually build their houses in the past?
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、The salt cannot be removed totally.
D、Seawater can’t be processed.
答案
A
解析
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://kaotiyun.com/show/exjJ777K
0
大学英语四级
相关试题推荐
有关脑出血的描述,正确的是
按验收方式划分,建设工程采购方在所购物资制造时就派人在供应厂家进行材质检验的验收方式,属于()。
人类社会在发展过程中,如何合理利用自然条件,一直是人们关注的话题。下列关于人口与环境污染关系的说法,正确的是()。
PASSAGETWOWhyitwouldn’tbepossiblewithoutaprivatecareveninEurope(Para.8)?
A、Keepingupdatedwithcurrentinternetapplications.B、Splittingthebillwiththeirchildrenforgoingonline.C、Gettingthep
DaydreamingI.DaydreamingcanbeharmfulbecauseitwasconsideredasA.awasteof【T1】______B.a【T2】______ofneur
A、ThisThursday.B、RightAftertheinterviewoftwomoreapplicants.C、Withinaweek.D、Itisnotmentioned.C对话的最后,面试官提到,他们公司的做
AspectsthatMayFacilitateReadingI.Determiningyour【T1】______A.Readingfor【T2】______:likereadingthenovelHar
A、Itmainlysellspetfoods.B、Itisadoggydaycarecenter.C、Itprovidespetswithmealsandsoftbeds.D、Itprovidesdelivery
A、Shewasinterestedinlawandhadworkedonit.B、Shewaswillingtoexperienceajobrelatedtolaw.C、Shedidn’tliketofin
随机试题
引起头痛的颅外病变是
女性,31岁,已婚,停经36天后不规则阴道流血10天,伴右下腹剧痛。检查:体温37.2℃,脉搏108次/分,血压120/80mmHg,阴道见少量暗红色积血,宫颈轻度糜烂,举痛,子宫中位,正常大小,右侧附件扪及约4cm大小的肿块,边界不清。最可能的诊断是
为保证路面结构层的设计厚度,可采用()法计量。
轨道结构精磨前,焊接接头及两端1m范围内温度应控制在()以内。
A、B两家公司属于非同一控制下的两个独立公司。A公司于2008年7月1日以本企业的固定资产对B公司投资,取得B公司60%的股份。该固定资产原值1500万元,已计提折旧300万元,已提取减值准备50万元,7月1日该固定资产公允价值为1250万元。该项投资另发
存取速度最快的是______。
On-the-jobsmokingisahotissueforbothsmokersandnon-smokers,andmanymanagersnowseesmokingasaproductivity(生产力)pr
Ofallthesymbols,______,whichareconsideredtorepresentfertilityandnewlife,arethosemostfrequentlyassociatedwithE
Takethreematchesfromthispatternandleavethreesquares.Whichonesshouldbetakenaway?
Serviceenterprisesincludemanykindsoffamiliarbusinesses.Examplesincludedrycleaners,shoerepairstores,barbershops,
最新回复
(
0
)