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
2024-03-12
70
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 the key player in this scenario is the West Antarctic ice sheet, a Brazil-size mass of frozen water that is much as 7000 feet thick. Unlike floating ice shelves which have little impact on sea level when they break up, the ice sheet is anchored to bedrock, will 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 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 Engleheart, a co-author from the California Institute of Technology says , ’’The West Antarctic ice sheet disappeared once and can disappear again. ’’
Questions 9 to 12 are based on the passage you have just heard.
9. What is one of the most frightening threats of global warming according to the passage?
10. What do scientists disagree on?
11. What is the latest information revealed about the West Antarctic ice sheet?
12. What do the scientists’ latest findings 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
选项表示冰原的某种状态。听力篇章接下来讲,最新的科学发现揭示:南极冰原在过去一百三十万年内至少坍塌过一次。由此判断A)为正确选项。
转载请注明原文地址:http://tihaiku.com/zcyy/3526358.html
相关试题推荐
[originaltext]Thetimeis9o’clockandthisisMarianSnowwiththenews.
[originaltext]Thetimeis9o’clockandthisisMarianSnowwiththenews.
[originaltext]Thetimeis9o’clockandthisisMarianSnowwiththenews.
[originaltext]It’salwaysfuntowriteaboutresearchthatyoucanactually
[originaltext]Amongglobalwarming’smostfrighteningthreatsisthepredic
[originaltext]Amongglobalwarming’smostfrighteningthreatsisthepredic
[originaltext]FlorenceHayesisajournalistfortheGreenVilleJournal,t
[originaltext]FlorenceHayesisajournalistfortheGreenVilleJournal,t
[originaltext]Somehowtheoldmaleandfemalestereotypesnolongerfit.Me
[originaltext]ThereareroughlythreeNewYorks.Thereis,first,theNewY
随机试题
不知道我们这一生究竟要讲多少句话。如果有一种工具可以统计,像步行锻炼的人所带的计步器那样,我相信其结果必定是天文数字,其长可以绕地球几周,其密可以下大雨
AlltherecentnewsonAIDSisbad.ThedeathofRockRudsonlastyearraise
下列各项,属于固定成本的有( )。A.运输活动所需原料 B.工人工资
根据《侵权责任法》规定,饲养的动物造成他人损害的,动物饲养人或者管理人应当承担侵
有关2000版ISO9000族标准的八项质量管理原则中的持续改进整体业绩的目标,
调配时应后称的药物是A.牛蒡子 B.通草 C.熟地黄 D.生石膏 E.大
某企业的110kV变电所,地处海拔高度900n,110kV釆用半高型室外配电装置
2016-137.根据《风景名胜区管理条例》,下列说法中,正确的有()。A.在风
在营业线桥梁改建施工中,加高桥梁墩台的方法包括( )。A.砂浆垫高支座法 B
某建设项目需租用钢管脚手架,出租方和承租方口头约定租期为8个月。下列关于该租赁合
最新回复
(
0
)