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
A、It collapsed at least once in the past 1. 3 million years. B、It sits firmly on solid rock at the bottom of the ocean. C、It mel
A、It collapsed at least once in the past 1. 3 million years. B、It sits firmly on solid rock at the bottom of the ocean. C、It mel
admin
2011-01-10
51
问题
Among global warming’s most frightening threats is the prediction that the polar ice-caps will melt, raising sea level so much that coastal cities from New York to Los Angles to Shanghai will be flooded.
Scientists agree that key player in this scenario is the West Antarctic ice sheet, a Brazil-size mass of frozen water that is as much as 7, 000 feet thick. Unlike floating ice shelves which have little impact on sea level when they break up, the ice sheet is anchored to bedrock well blow the sea surface. Surrounded by open ocean, it is also vulnerable, but Antarctic experts disagree strongly on just how unstable it is.
Now, new evidence reveals that all or most of the west Antarctic ice sheet collapsed at least once during the past 1. 3 million years, a period when global temperatures probably were not significantly higher than they are today. And the ice sheet was assumed to have been stable. In geological time, a million years is recent history. The proof, which was published last week in Science, comes from a team of scientists from Uppsala University in Sweden and the California Institute of Technology who drilled deep holes near the edge of the ice sheet. Within samples collected from the solid substance lying beneath the ice,they found fossils of microscopic marine plants which suggest that the region was once an open ocean, not solid ice. As Herman Englehart, a co-author from the California Institute of Technology says, "the West Antarctic ice sheet disappeared once, and can disappear again. "
26. Q: What is one of the most frightening threats of global warming according to the passage?
27. Q:What did scientists disagree on?
28. Q:What does the latest information reveal about the West Antarctic ice sheet?
29. Q:What does the scientists’ latest finding suggest?
选项
A、It collapsed at least once in the past 1. 3 million years.
B、It sits firmly on solid rock at the bottom of the ocean.
C、It melted at temperatures a bit higher than those of today.
D、It will have little impact on sea level when it breaks up.
答案
A
解析
现在有新的证据表明,西南极冰原在过去的130万年中至少崩溃过一次。
转载请注明原文地址:https://kaotiyun.com/show/a7s7777K
0
大学英语六级
相关试题推荐
Letussupposethatyouareinthepositionofaparent.Wouldyouallowyourchildrentoreadanybooktheywantedtowithoutf
Inabout45years,temperaturesonEarthwillbehotterthanatanytimeduringthepastonemillionyears,saystheU.S.【B1】____
Millionsofyoungpeoplearecreatingblogs.Millionsofothersarereadingthem.Theword"blog"isashortwayofsayingWebl
A、Gooutfordinner.B、WatchthedocumentarywiththemanC、Godancing.D、Watchagameshow.B综合推断题。男士说自己在看有关加勒比海海豚的纪录片,女士觉得那很有趣
Dafterinterviewingbecomecommonpractice【S1】______intheUnitedStates,AmericanjournalistswereteachingEurope
A、ResidentialareaB、ShoppingcentersC、Parkinglots.D、Shoppingcentersorparkinglotsnearstadiumsorgymnasiums.D信息明示题。由文章
A、Thewomanistheman’sboss.B、Themanisthewoman’shusband.C、Thewomanistheteacherofthechild.D、Thewomanwantstok
A、Becausethereissomeonewhowantstostealhisproperty.B、Becauseheisthefocusofthespecialnewspapers.C、Becauseheis
A、Earnmoneytopaytherent.B、Buyfurniturefortheapartments.C、Signahousingcontract.D、Earnmoneytobuyacar.B事实细节题。
随机试题
关于中度脱水丢失体液量的描述,正确的是
某省海兴市的《现代企业经营》杂志刊登了一篇自由撰稿人吕某所写的报道,内容涉及到同省龙门市甲公司的经营方式。甲公司负责人汪某看到该篇文章后,认为《现代企业经营》作为一本全省范围内发行的杂志,其所发文章内容严重失实。损害了甲公司的名誉,使公司的经营受到影响。于
依据《烟花爆竹安全管理条例》的规定,进入仓库区的机动车辆必须有防火花装置,且速度不得超过()km/h。
关于报关员考核记分,下列表述正确的有( )。
下列属于非货币性资产交换的有()。Ⅰ.以其他应收款换入投资性房地产Ⅱ.以持有至到期债券投资换入固定资产Ⅲ.以交易性金融资产换入长期股权投资Ⅳ.以公允价值100万元专利技术和公允价值30万元应收账款换入一批存货
甲公司是一家健身器材销售公司,为增值税一般纳税人,适用增值税税率为17%。2013年1月1日,甲公司向乙公司销售5000件健身器材,单位销售价格为1000元,单位成本为800元,开出的增值税专用发票上注明的销售价格为5000000元,增值税额为85000
古罗马的西塞罗曾说:“优雅和美不可能与健康分开。”意大利文艺复兴时代的人道主义者洛伦佐.巴拉强调说,健康是一种宝贵的品质,是“肉体的天赋”,是大自然的恩赐。他写道:“很多健康的人并不美,但是没有一个美的人是不健康的。”以下各项都可以从洛伦佐?巴拉
阅读下列说明,回答问题1至问题3,将解答填入答题纸的对应栏内。【说明】某项目由A、B、C、D、E、F、G、H活动模块组成,下表给出了各活动之间的依赖关系,以及它们在正常情况和赶工情况下的工期及成本数据。假设每周的项目管理成本为10万元,而且项目
中秋节将至,给客户张经理发一封邮件,送上自己的祝福。新建一封邮件,收件人为:zhangqiang@sina.com,主题为:中秋节快乐!内容为:张总,祝您节日快乐,身体健康,工作顺利!
Whatdoesthemansuggest?
最新回复
(
0
)