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
Arctic Melt Earth’s North and South Poles are famous for being cold and icy.Last year,however,the amount of ice in the Arctic
Arctic Melt Earth’s North and South Poles are famous for being cold and icy.Last year,however,the amount of ice in the Arctic
admin
2011-01-10
70
问题
Arctic Melt
Earth’s North and South Poles are famous for being cold and icy.Last year,however,the amount of ice in the Arctic Ocean(北冰洋)fell to a record low.
Normally,ice builds in Arctic waters around the North Pole each winter and shrinks(缩小)during the summer.But for many years,the amount of ice left by the end of summer has been declining.
Since 1979,each decade has seen an 11.4 percent drop in end-of-summer ice cover.Between 1981 and 2000.ice in the Arctic lost 22 percent of its thickness-becoming 1.13 meters thinner.
Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That’s 38 percent less area than the average cover at that time of year.And it’s a very large 23 percent below the previous record low,which was set just 2 years ago.This continuing trend has made scientists concerned.
There may be several reasons for the ice melt,says Jinlun Zhang,an oceanographer(海洋学家)at the University of Washington in Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic.1eaving a large area of thin ice and open wa ter.
Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5? Celsius warmer than average and 1.5℃ warmer than the previous record high.
With both air and water getting warmer,the ice is melting from both above and below.In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 cm by season’s end.
The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice cover from above.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.
The word“builds”in paragraph 2 could be best replaced by______.
选项
A、establishes.
B、expands.
C、creates.
D、constructs.
答案
B
解析
依据单词所在语境,“build”主要是指冰层在冬天范围的扩大。所以,B选项expands“膨胀”与其意思相符,故选B。
转载请注明原文地址:https://kaotiyun.com/show/d2Qd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Common-coldSenseYoucan’tbeatit,butyoudon’thavetojoinit.Maybeitgotthename"commoncold"becauseit’smorec
U.S.EatsTooMuchSaltPeopleintheUnitedStatesconsumemorethantwicetherecommendedamountofsalt,raisingtheirr
KnowingYourRealPersonalityfromSleepingPositionsEveryonehasgottwopersonalities—theonethatisshowntotheworld
Thepresidentproposedthatweshouldbringthemeetingtoaclose.
Thechairmanproposedthatweshouldstopthemeeting.
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
Parentsshouldrealizedthat"exampleisbetterthanprecept".
Thetelephonesystemisnolongeroperative.
WewereshockedtofindthatMarydid’tknowherguest’sname.
随机试题
关于胸外心脏按压,下列不正确的是()
炎症过程中最早出现的血管反应是
列缺穴的简便取穴法为
急进性肾小球肾炎最突出的临床表现是
GBZ2.1-2007中规定工作场所空气中容许浓度的粉尘包括
患者,女,23岁。有长期癫痫病史,来院前6小时内发作2次,到院后又有一次全身性大发作,历时2分钟,现处于发作后状态,宜采取的治疗是
甲的汇票遗失,向法院申请公示催告。公告期满后无人申报权利,甲申请法院作出了除权判决。后乙主张对该票据享有票据权利,只是因为客观原因而没能在判决前向法院申报权利。乙可以采取哪种法律对策?()
()提出了“儿童中心”“活动中心”“经验中心”的新三中心论。
张先生认识赵、钱、孙、李、周5位女士。(1)5位女士分为两个年龄档:3位女士小于30岁,2位女士大于30岁;(2)2为女士是教师,其他3位女士秘书;(3)赵和孙属于相同年龄档;(4)李和周不属于相同年龄档;
对管理信息系统的结构描述,一般可以从横向和纵向两个方面来描述。“人员结构安排”是哪个管理层次的管理信息系统的任务?
最新回复
(
0
)