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
One billion people in the world are short of water. How can this problem be solved? Some suggestions have been to desalinate oce
One billion people in the world are short of water. How can this problem be solved? Some suggestions have been to desalinate oce
admin
2016-11-21
32
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.
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://jikaoti.com/ti/8NnMFFFM
0
专业英语四级
相关试题推荐
Somebelievethatintheageofidentikitcomputergames,massentertainmentandconformityonthesupermarketshelves,trulyin
Americansoftensaythatthereareonlytwothingsapersoncanbesureofinlife:deathandtaxes.Americansdonothaveacor
ThreeyearsagoElonCollege,aschoolofmorethan4,000studentswitharisingacademicreputation,decideditwasnolongerg
Womendriversaremorelikelytobeinvolvedinanaccident,accordingtoscientists.Researchers【C1】______6.5millioncar
Theconceptofpersonalchoiceinrelationtohealthbehaviorsisanimportantone.Anestimated90percentofallillnessmayb
AllthefollowingsentencesdefinitelyIndicatefuturetimeEXCEPT______.
A、Talkingtoomuch.B、Beingtooaggressive.C、Beingtoopassive.D、Gettingtongue-tied.A本题考查细节。由句(2)可知,男士说他与女性接触时会结巴和出汗,故排除D;他表
A、Themeansoftransport.B、Thelivingcosts.C、Thelivinghabit.D、Thepaceoflife.D本题考查细节。由句(8)可知,男士告诉女士,她面临的最大变化将是生活节奏的改变,因
A、Fouryearsago.B、Tenyearsago.C、Fiveyearsago.D、Eightyearsago.C本题考查时间。由句(9)可知,Alex提到五年前他还没有使用Facebook时的情况,故C为答案。
A、Presentations.B、Examinations.C、Projects.D、Groupwork.C本题考查细节。由句(3)可知,Patrick提到现在的学生比起他自己上学的时候会进行更多的项目,A、B和D均没有提到,故C为答案。
随机试题
常伴有抽搐的甲状腺癌是
“三查七对、一注意”,一注意是指()。
关于三合土垫层,下列说法中错误的是()
旅游旺季,小王不慎丢失导游证,在补办导游证期间,他可去旅游局申领临时导游证,继续导游活动,以解导游人员短缺之急。()
捷克著名教育家夸美纽斯的《大教学论》(1632年)标志着教育学达到了科学化水平。()
青少年身体素质发育和运动能力的关系。
在秦朝中央集权制度下,掌管国家监察事务权力的是:
已知数列的递推公式如下:
SomeSchoolingonBackpacksAccordingtotheU.S.ConsumerProductSafetyCommission,5,900kidsweretreatedathospital
A、Hedidn’tknowwhatwouldhappenifhemadethesuggestion.B、Hedidn’tfeelnervousafterhehadputforwardthesuggestion.
最新回复
(
0
)