首页
登录
职称英语
[originaltext] Among global warming’s most frightening threats is the predic
[originaltext] Among global warming’s most frightening threats is the predic
游客
2024-05-28
2
管理
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、How humans are to cope with global warming.
B、How unstable the West Antarctic ice sheet is.
C、How vulnerable the coastal cities are.
D、How polar ice impacts global weather.
答案
B
解析
研究南极的专家对于南极冰原到底有多脆弱看法不一。
转载请注明原文地址:https://tihaiku.com/zcyy/3609293.html
相关试题推荐
[originaltext]M:Ijustcalledthetravelagency,it’sallset.OnJunefirst,
[originaltext]M:Ijustcalledthetravelagency,it’sallset.OnJunefirst,
[originaltext]M:Ijustcalledthetravelagency,it’sallset.OnJunefirst,
[originaltext]AccordingtoanewstudydoneattheMedicalschooloftheUn
[originaltext]AccordingtoanewstudydoneattheMedicalschooloftheUn
[originaltext]AccordingtoanewstudydoneattheMedicalschooloftheUn
[originaltext]Therearemanywaystoloseweight.Firstofall,startsmall
[originaltext]M:Ifthetrafficwasn’theldupforsolong,Iwouldhavebeent
[originaltext]M:Ifthetrafficwasn’theldupforsolong,Iwouldhavebeent
[originaltext]M:Ifthetrafficwasn’theldupforsolong,Iwouldhavebeent
随机试题
ElectronicReadingDevicesA)Morethan550yearsafterJ
Manyparentsmaythinkthateachnewsibling(兄弟姐妹)offerstheirchildrenthe
Aremarkablevarietyofinsectsliveinthisplanet.Morespeciesofinsects
口尝有麻舌感的果实种子类中药为A.蛇床子 B.牵牛子 C.菟丝子 D.白芥
A.习惯性流产 B.流产感染 C.完全流产 D.不全流产 E.稽留流产流
烧伤死亡的最重要原因是:A.感染 B.肾功能衰退 C.休克 D.应
Theradioset________hasgonewrong.A.I
民事行为成立的一般要件包括()。A.行为人须有意思表示 B.行为人的意思表示必
噬菌体的基因组比较小,复制迅速,使得对要在噬菌体中获得多重突变体的遗传分析来说是
在一个团体中,影响个体的从众行为最重要的因素不包括()。A.团体一致性 B
最新回复
(
0
)