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
Earth’s North and South Poles ale famous for being cold and icy. Last year, however, the amount of ice in the Arctic Ocean feU t
Earth’s North and South Poles ale famous for being cold and icy. Last year, however, the amount of ice in the Arctic Ocean feU t
admin
2012-06-27
46
问题
Earth’s North and South Poles ale famous for being cold and icy. Last year, however, the amount of ice in the Arctic Ocean feU to a record low.
Normally, ice builds in Arctic waters around the North Pole each winter and shrinks 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. Betweenl981 and 2000, ice in the Arctic lost 22 percent of its thickness, becoming 1. 13 meters thinner.
Last summer, Arctic sea ice reached its skimpiest levels yet. By the end of summer 2007, theice 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 scientists concerned.
There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer at the University of Washington at Seattle. Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic, leaving a large area of thin ice and open water.
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 warnls both the water and the atmosphere. In parts of the Arctic Ocean last year, surface temperatures were 3. 5℃ 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 Darts 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 centimeters 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, says Donald K. Perovich, a geophysicist at the U. S. Army ColdRegions Research and Engineering Laboratory in Hanover, N. H.
Some scientists fear that the Arctic is stuck in a wanning trend from which it may never recover.
Why is the ice melting from both above and below?
选项
A、Because extra heat warms the air.
B、Because extra heat warms the water.
C、Because the temperature above the water is higher.
D、Both A and B
答案
D
解析
细节题。利用题干melting from both above and below可以定位到第七段的第一句话“With both air and water getting warmer,the ice is melting from both above and below”,意为“随着空气和水变暖,冰层从上面和下面开始融化”,可知答案为D。
转载请注明原文地址:https://kaotiyun.com/show/czXO777K
0
在职攻硕英语联考
相关试题推荐
TestshaveconfirmedthatfourpeopleinWisconsincontractedthemonkeypoxvirusaftercomingintoclosecontactwithpetprair
Thetwonewspapersgavedifferent______ofwhathappened.
We’veallheardaboutendangeredanimals.Creatureslikethecriticallyendangeredblackrhinocerosarefamous.Butwhatarethe
We’veallheardaboutendangeredanimals.Creatureslikethecriticallyendangeredblackrhinocerosarefamous.Butwhatarethe
Envyhasbecomeadrivewheelofourmodernworld.Itisthepassionthatgovernsoureconomiclife.Moderncapitalismrelieson
Envyhasbecomeadrivewheelofourmodernworld.Itisthepassionthatgovernsoureconomiclife.Moderncapitalismrelieson
Thefinal______crycomeswhenhecomplainsabouthersellingtheirstorytoanewspaper;shewasendangeringhisfutureandfree
Atpresent,itisnotpossibletoconfirmortorefutethesuggestionthatthereisacausalrelationshipbetweentheamountof
IntheviewoftheprimatologistSarahBlafferHrdy,theextraordinarysocialskillsareattheheartofwhatmakesushumans.T
随机试题
自动控制系统安全措施主要是防止雷击等自然灾害损坏系统和人的()造成的损坏。
Passengersshouldallowfor______traveltimetotheairportinrushhourtraffic.
甲方、乙方因一起经济纠纷案件诉至法院,法院判决乙方向甲方给付93万元。由于乙方不主动履行义务,甲方申请法院强制执行。执行时,由于执行人员对乙方极为不满,因此故意将乙方的98万元存款强行划拨,乙方要求法院赔偿因错误强制执行所造成的损失。对此,法院应如何处理?
石灰工业废渣稳定土基层施工的要点有()。
下列关于个人所得税的表述中,正确的是()。
如果旅游者在游览活动中走失,导游人员应立即向其他旅游者、景点工作人员及有关人员了解情况,分析走失者可能在何时、何处走失,并迅速组织全陪、领队及旅游者分头寻找。()
组织结构受到很多因素的影响和制约,下列说法不正确的是()。
在全国通用的烧伤补液公式中,下列正确的是()。
根据下表,回答以下问题。哪些运输方式在2014年11月的货物运输量占当月货物运输总量的比重超过上年同期水_________。
软件生命周期中的活动不包括()。
最新回复
(
0
)