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
57
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
Researchersareincreasinglyinterestedinmanipulatingtheenvironmentearlyinchildren’sliveswhentheyareperceivedtobe
A、Toindicatehowonecangetbetterservice.B、Toexplainthederivationoftheword"tip".C、Toillustratewhydifficultcusto
A、Takingsmallstepsbitbybit.B、Havingagoodplan.C、Joiningatrainingclass.D、Learning30wordsperday.A事实细节题。Adams博士在对
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
A、Shebrokethemicrophone.B、Shewasinterruptedbyaphonecallduringherpresentation.C、Sheisplanningtogiveherpresent
Teenagersarespendingmoremoneythanever.Justlastyear,31.6millionteensspent155billion,accordingtotheNorthbrook,
A、Hethoughtthewoman’sbirthdaywasnextweek.B、Therestaurantclosesearlyduringtheweek.C、Thewomanshouldfindoutifs
Icebergsareamongnature’smostspectacularcreations,andyetmostpeoplehaveneverseenone.Avagueairofmystery【C1】_____
Icebergsareamongnature’smostspectacularcreations,andyetmostpeoplehaveneverseenone.Avagueairofmystery【C1】_____
随机试题
我国对外开放的基本形式有()
诊断考虑若患者入院时pH7.33,纠正缺水后是否补充碱剂?应根据
关于货币犯罪,下列哪一选项是错误的?(2013年卷二第14题)
根据《民用建筑工程室内环境污染控制规范》的规定,民用建筑工程及室内装修工程的室内环境质量验收,应在工程完工至少()天以后、工程交付使用前进行。
某药品连锁企业欲在原有管理的基础上建立一套适合本企业的具有基本功能的管理信息系统,以提高企业的管理水平和经济效益。经对本企业现状分析后决定采取委托开发的方式进行开发,现已成立了以公司总经理为组长的“企业管理信息系统开发小组”,并为此审批了专项资金。开发小组
游客携带中药材、中成药出境,前往国外的,总值限人民币300元。()
法律、法规未规定行政复议是行政诉讼的必经程序的,公民、法人或其他组织既提起诉讼又申请复议的,应由法院先受理,因为处理复议与诉讼的关系应遵循司法最终解决原则。()
越来越多的人表示愿意购买医疗保险产品,但医疗保险产品的销售情况并没有与需求保持______。因为消费者并不单是从开支管理角度来考虑,更多的是受到情感的______,他们真正寻求的是一种心里安定,这往往是销售者所______的。依次填入划横线部分最恰当
WhatinformationaboutMr.Westcanwegetfromthepassage?
Whatreleasedanestimated8.7milliontonsoftheglobalwarminggas?
最新回复
(
0
)