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
54
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’smadeupofprofessionalathletes.B、It’smadeupofcollegeplayers.C、It’smadeupofbothprofessionalandcollegeplay
A、Tipsarepartoftheirsalary.B、Tipsmeansgoodservice.C、Tipsmeanslotsofmoney.D、Tipsmeansthepraiseoftheboss.AWh
A、Takingsmallstepsbitbybit.B、Havingagoodplan.C、Joiningatrainingclass.D、Learning30wordsperday.A事实细节题。Adams博士在对
A、Itcosts1.5dollarstogetaseven-daypass.B、Theregularticketcanbeusedunlimitedly.C、Itcosts17dollarstobuyareg
Icebergsareamongnature’smostspectacularcreations,andyetmostpeoplehaveneverseenone.Avagueairofmystery【C1】_____
Icebergsareamongnature’smostspectacularcreations,andyetmostpeoplehaveneverseenone.Avagueairofmystery【C1】_____
A、Manyspecieshavemigratednorth.B、Animalsandplantshavebeenabletoadapttochanges.C、Warmertemperatureshavereturned
随机试题
A、$20000everyyear.B、$5100everytwoyears.C、$510everyyear.D、$200everytwoyears.D
男,35岁。因急性阑尾炎穿孔,行阑尾切除手术后5天,仍有腹胀、腹痛,体温38.5℃,大便4~6次/天,有下坠感。首选的检查是
已知钢筋混凝土过梁净跨In=3.0m,过梁上砌体高度1.2m,墙厚190mm,墙体采用MU7.5砌块、Mb5混合砂浆砌筑,承受楼板传来的均布荷载设计值15kN/m。过梁伸入墙内200mm,砌块厚度为190mm,双面抹20mm混合砂浆,单位面积容重为3.38
大气环境影响预测分析与评价时,需叠加现状背景值,分析项目建成后最终的区域环境质量状况,下列公式正确的是()。
非接触式火灾探测器主要是根据火焰或烟气的光学效果进行探测的,主要包括()。
Costofdocumentationisfixedforalmostanysizeofconsignment.
下列关于乘数效应的说法中,正确的有()。
下列人员中,不能担任公司法定代表人的是()。
Manywilldoubttobaccoindustryclaimsthatitissharpeningitssciencetoevaluate"healthiercigarettes".Butthat’swhatwi
A、19.B、9.C、22.D、33.B新闻提到,与该女性失踪和死亡相关的九名嫌疑人已被拘留,故本题答案为B。
最新回复
(
0
)