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
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once trea
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once trea
admin
2013-06-02
30
问题
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being【C1】______ quite seriously by many nations, especially since scientists have warned that the human race will【C2】______ its fresh water supply faster than it runs out of food.
Glaciers are a possible 【C3】______ of fresh water that has been overlooked until recently. Threequarters of the Earth’s fresh water supply is still tied up in glacial ice, a reservoir of【C4】______ fresh water so immense that it could 【C5】______ all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica.
Huge glaciers that【C6】______ over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes, rather, they are formed【C7】______ on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction【C8】______ to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. To control them and【C9】______ them to parts of the world where they are needed would not be too difficult.
The. difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling (传送) of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalinization (脱盐), or【C10】______ salt from water.
A) removing
B) stretch
C) deriving
D) entirely
E) untapped
F) resource
G) outgrow
H) opposite
I) approximately
J) considered
K) similar
L) source
M) ensured
N) sustain
O) steer
【C5】______
选项
答案
N
解析
此处需要及物动词原形作谓语。词库中符合条件的动词有stretch,sustain和steer,而根据前面的so immense可知此句意为“冰川的水量极大,足以维持地球上所有河流”,因此sustain符合句意,为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/0O67777K
0
大学英语六级
相关试题推荐
Researchersareincreasinglyinterestedinmanipulatingtheenvironmentearlyinchildren’sliveswhentheyareperceivedtobe
A、Hewasinjuredinafightandhadtoleavethegame.B、Hefoughtwithanotherplayer.C、Hegotinafightwithafanandwast
A、It’sneartheMexicoCity.B、It’sinGuatemala.C、It’sstretchedfromtheplainsofcentralMexicotothemountainsofGuatema
A、Takingsmallstepsbitbybit.B、Havingagoodplan.C、Joiningatrainingclass.D、Learning30wordsperday.A事实细节题。Adams博士在对
A、Theyarecheckingthepostersontheofficewalls.B、Themansuggeststhewomantolookattheposterseveryhour.C、Theycan
A、Themanwillcallthewomansometimeinthefuture.B、Themandoesn’tknowwherethewomanlives.C、Themanhopestostayint
A、Takesomemedicine.B、Seeadoctor.C、Buyanewthermometer.D、Gotobedimmediately.A男士不确定自己是否发烧了,又不小心把体温计摔坏了。女士建议他可以服两片阿司匹林
Teenagersarespendingmoremoneythanever.Justlastyear,31.6millionteensspent155billion,accordingtotheNorthbrook,
Icebergsareamongnature’smostspectacularcreations,andyetmostpeoplehaveneverseenone.Avagueairofmystery【C1】_____
Goodjobsarescarcethesedays,withroughly15millionAmericansoutofworkandanationalunemploymentrateof10percent.P
随机试题
RemembertheStoneAgedaysofresearchbackinelementaryschoolandmiddleschool?Wewouldspendcountlesshoursdigestingth
窦性心动过缓不发生于()。
X线管的焦点不包括
背景资料某综合楼工程,地下三层,地上二十层,总建筑面积68000m2。地基基础设计等级为甲级,灌注桩筏板基础,现浇钢筋混凝土框架剪力墙结构。建设单位与施工单位按照《建设工程施工合同(示范文本)》签订了施工合同,约定竣工时需向建设单位移交变形测量报告,部分
派生需求是由阿弗里德.马歇尔在其《经济学原理》一书中首次提出的经济概念。是指对生产要素的需求是由对该要素与生产的产品的需求派生出来的,又称“引致需求”。根据上述定义.下列不属于派生需求的是:
把下面的六个图形分成两类,使每一类图形都有各自的共同特征或规律。分类正确的一项是:
0.8生活学是台湾地区、日本流行的一种生活哲学。0.8生活学的真谛是:生活需要冲,更需要缓冲。尽80%的力气就好了,剩下20%的力气权当回旋的余地和养精蓄锐的本钱。根据上述定义,下列符合0.8生活学的是:
布鲁纳的螺旋式课程理念是基于他提出的
Atthefootofthemountain______.
A、Andersonishungry.B、Andersonisnothungry.C、Andersonisfull.D、Andersonisnotfull.B该题为推理题,根据男士的否定回答可知他认为Anderson并不饿。
最新回复
(
0
)