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
35
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
IsthereenoughoilbeneaththeArcticNationalWildlifeRefuge(保护区)(ANWR)to
[originaltext]W:OK,that’sit.Nowwehavetomakeadecision.Wemightaswel
GPSTheGlobalPositioningSystemisaspace
Accordingtowiedemann-Franzlaw,forpuremet
下列符合汽车客运站场设置要求的有()。A.客运场站与市内集疏道路系统结合 B
现金流量表是以()为基础的。A.权责发生制 B.重置成本 C.收付实现制
骨髓象中涂抹细胞多见是A:急性粒细胞白血病的特征之一B:急性淋巴细胞白血病的特
治疗癫痫大发作的首选药是A:苯妥英钠 B:乙琥胺 C:丙戊酸钠 D:卡马西
从健康传播效果的层次看,以下表述属于健康信念认同的是A.相信低钠盐有利于健康
属于静态的员工素质测评的有( )。A.考试 B.问卷调查 C.心理测验
最新回复
(
0
)