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
12
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、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://tihaiku.com/zcyy/3609294.html
相关试题推荐
[originaltext]Somepeoplehaveverygoodmemories,andcaneasilylearnqui
[originaltext]Today,I’llbetalkingabouttheinventionofthecameraand
[originaltext]W:Hello,Mark.Haveyoueverplayedcricket?M:No,never.Have
[originaltext]W:Hello,Mark.Haveyoueverplayedcricket?M:No,never.Have
[originaltext]M:I’msotired,Ican’tseestraight.W:You’vebeentiredalot
[originaltext]M:I’msotired,Ican’tseestraight.W:You’vebeentiredalot
[originaltext]M:I’msotired,Ican’tseestraight.W:You’vebeentiredalot
[originaltext]M:Icouldn’tputupwithmywifeanylonger.Idon’tknowwhysh
[originaltext]M:Icouldn’tputupwithmywifeanylonger.Idon’tknowwhysh
[originaltext]M:Icouldn’tputupwithmywifeanylonger.Idon’tknowwhysh
随机试题
[A]irrelevant[I]ornamentally[B]reversed[J]discriminate[C]personnel
ImetTim’ssisteryesterday.Sheis_______thanTim.A、muchmoredancerB、more
Nappingisoneofthebest,mostunderusedtoolsforbusypeople.Itisfro
[originaltext]W:Areyoubusythisevening?I’mgoingovertotheInternational
焊接网中的钢丝直径为防腐处理前裸钢丝直径。()
跨中最大正弯矩最不利位置加载是简支梁桥静载荷试验的主要加载工况。()
西红花药材的主产地是A.西藏B.西班牙及希腊C.马来西亚,新加坡D.越南,柬埔寨
单位生化反应难以将沙门菌属鉴定菌种时,应进行()。A.血清学试验 B.枸橼酸
(2017年真题)蒙医中的"三秽”指的是( )A.涕、唾、津三种分泌物 B.
(2017年真题)关于房屋建筑工程在正常使用条件下最低保修期限的说法,正确的是(
最新回复
(
0
)