首页
登录
职称英语
One billion people in the world are short of water. How can this problem be
One billion people in the world are short of water. How can this problem be
游客
2024-09-16
36
管理
问题
One billion people in the world are short of water. How can this problem be solved? Some suggestions have been to desalinate ocean water or to build enormous water pipelines from areas where water is abundant.(Suggestions such as these prove extremely expensive when they are actually used.)One possibility that scientists are considering is pulling icebergs from either the North Pole or the South Pole to parts of the world with a water shortage. Although many questions must be answered before such a project could be tried, moving icebergs seems a reasonable possibility in the future.
Engineers, mathematicians, and glaciologists from a dozen countries have been considering the iceberg as a future source of water. Saudi Arabia is particularly interested in this project because it has a great water shortage. Scientists estimate that it would take 128 days to transport a large iceberg(about 1/2 square mile)to Saudi Arabia. Yet the iceberg would be completely melted by the 104th day. Therefore, insulation would be essential, but how to insulate the iceberg remains an unsolved problem.
The problems in transporting an iceberg are numerous. The first problem is choosing the iceberg to pull. The icebergs that form in the North Pole are quite difficult to handle because of their shape. Only a small portion extends above the water — most of the iceberg is below the surface, which would make it difficult to pull. South Pole icebergs, on the other hand, are flat and float like table tops. Thus they would be much easier to move.
How can a 200-million-ton iceberg be moved? No ship is strong enough to pull such enormous weight through the water. Perhaps several ships could be used. Attaching ropes to an iceberg this size is also an enormous problem. Engineers think that large nails or long metal rods could be driven into the ice. What would happen if the iceberg splits into several pieces during the pulling? Even if an iceberg with very few cracks were chosen, how could it be pulled through stormy waters? Furthermore, once the iceberg reached its destination, very few ports would be deep enough to store it.
All of these problems must be solved before icebergs can become a reasonable source of water. Yet scientists estimate that it will be possible to transport them in the near future. Each year, enough icebergs form to supply the whole world with fresh water for a full year. In addition, icebergs are free and nonpolluting. As a solution to the world’s water problems, icebergs may be a workable possibility. [br] Which of the following can be the title of the passage?
选项
A、Icebergs for Water.
B、Shortage of Water.
C、Scientists and Icebergs.
D、Icebergs — Scientists’ Headache.
答案
A
解析
主旨大意题。全文讲述了将冰山作为淡水资源的设想以及实际操作中可能出现的各种问题,故答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3760220.html
相关试题推荐
[originaltext]Theresa:Hi,Frank,yoursurveysoundsverygood.Howmanypeople
[originaltext]Theresa:Hi,Frank,yoursurveysoundsverygood.Howmanypeople
[originaltext]Theresa:Hi,Frank,yoursurveysoundsverygood.Howmanypeople
[originaltext]Theresa:Hi,Frank,yoursurveysoundsverygood.Howmanypeople
______theendofthefilm,moreandmorepeopleleftthecinema.A、ToB、AtC、ByD
Ihave______muchtimeandthoughtontheproblem,butIamnonearertofinding
PASSAGETWO[br]Whyareagrowingnumberofpeopleusingcreditcardsnowadays?
Theencouragingfactoristhatthe______majorityofpeoplefindtheideaofchan
LikemanyothersocialproblemsincontemporaryAmerica,thewidegapbetweenme
PASSAGEFOURPeoplewhohadlostalovedone.从第4段可知David在母亲去世之后创办了AMF,第6段第1句提到AMF
随机试题
Theauthorityclaimsthatthenewpillscandramaticallyincreaselifeexpectanc
Inmanyculturespeoplemakeadistinctionbetweenfineartandfolkart.A
TheRealWalkersCompanyoffersaselectionofsmallgroupwalkingholidays
[audioFiles]audio_ehbm_j37001(20082)[/audioFiles]A、Idon’tlikeshopping.B、I’d
Dogswerefirstdomesticatedfromwolvesatleast17,000yearsago,butperh
《企业国有资产评估管理暂行办法》规定,企业提出资产评估项目核准申请时,应当向国有
患儿,10个月。腹泻3天,鼻塞流涕,每日腹泻10余次,臭味不甚,尿黄。查体:体温
普通小麦是六倍体,42条染色体,科学家用花药离体培育出的小麦幼苗是( )。A.
劳动力市场工资指导价位的制定步骤包括:①公开发布工资指导价位;②信息采集;③价位
髙位嫁接:是指把观赏树木的枝或芽嫁接在大规格的砧木上,实现快速形成树冠的一种培育
最新回复
(
0
)