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
2023-09-07
68
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/2993028.html
相关试题推荐
[originaltext](35)Researchindicatesthatparentswhorewardself-control
[originaltext](35)Researchindicatesthatparentswhorewardself-control
[originaltext](35)Researchindicatesthatparentswhorewardself-control
[originaltext]M:Welcometo“MovieontheShow”,todayourguestisNancyMeyer
Globalizationusedtomean,byandlarge,thatbusinessexpandedfromdevel
Globalizationusedtomean,byandlarge,thatbusinessexpandedfromdevel
Globalizationusedtomean,byandlarge,thatbusinessexpandedfromdevel
Globalizationusedtomean,byandlarge,thatbusinessexpandedfromdevel
[originaltext][32]Inthepastindustrieshadmorefreedomthantheyhaven
[originaltext][31]Theeconomiccostsofnoisetosocietyareseveral.[29
随机试题
ReadthistextaboutelectricalpowerinCanada.Choosethebestsentencefromt
[originaltext]Longago,nooneinEuropesmoked.Thetobaccoplantwasunkn
[originaltext]Watchingmoviesisagoodwaytoimproveyourlistening.Iwo
BeatrixPotters,inherbookillustrations,carefullycoordinatingthemwithher
按计价方式分类,饭店包括( )。A.美式计价饭店 B.百慕达计价饭店 C.
关于制定项目管理计划的描述,不正确的是( )。A、进度基准、成本基准和风险登记
关于施工图预算的作用,下列说法中正确的是()A.施工图预算可以作为业主拨付工
一个ATP分子中所含的高能磷酸键和磷酸基团的数目分别为()。A.1和2 B
一般情况下,房地产经纪机构的公司总部业务部门,可以根据()进行不同的设置。A
利用互联网收集二手资料的渠道有()。A.利用搜索引擎 B.访问相关网站 C
最新回复
(
0
)