首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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 melt
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 melt
admin
2020-12-10
31
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:https://kaotiyun.com/show/NAP7777K
0
大学英语六级
相关试题推荐
CountriesRushforUpperHandinAntarctica[A]Onaglacier-filledislandwithfjords(峡湾)andelephantseals,RussiahasbuiltAn
EliteMathCompetitionsStruggletoDiversifyTheirTalentPool[A]Interestinelitehighschoolmathcompetitionshasgrownin
A、Stayawayfrompartiesandcampussocialevents.B、Sticktogetheralwaysifgoingtothesocialevents.C、Checkoneachother
A、Sixtypercentofthepopulationwasbornin1975.B、Notenoughjobsareprovidedforjobseekers.C、Mostchildrencan’tafford
A、How724peoplelivedforthepast75years.B、Whatkeepspeoplehappyandhealthyinlife.C、Themeaningofwealthandhardwo
A、Theyhaveashortmemory.B、Theyhavenotime.C、Theyareunknowledgeable.D、Theyhavelanguageinterference.D
A、Studyinginaforeignenvironment.B、Livingfarawayfromfamily.C、Returningbacktohomecountry.D、Fittingintoaforeignc
A、Itisfoundontheshoresaroundtheworld.B、Ithasarousedpublicattention.C、Itishardtobreakdownnaturally.D、Ittake
A、Ithascausedtoomanycrimes.B、It’severyAmerican’swish.C、ItcausesafierceargumentintheUS.D、Itispartofwhatbui
A、Improvesystemsforreportingcrimes.B、Learnmoreaboutpreventingsexualviolence.C、Preventstudentsfromdrinkingalcohol.
随机试题
同一财产向两个以上债权人抵押的,拍卖、变卖抵押物所得的价款按照抵押物价值的大小来清偿。()
臂丛的组成是
平曲线半径()不设超高最小半径时,在平曲线范围内应设超高。
关于建筑面积计算,正确的说法是( )。
很少有人会主动去购买保险,这表明保险商品属于( )。
价值创造是财务战略的目标,现代财务实践认为经济增加值是判断经济活动是否带来价值创造的一个重要指标。影响经济增加值的直接因素不包括()。
在计算土地增值税应纳税额时,纳税人为取得土地使用权支付的地价款准予扣除。这里的地价款是指()。
处于感知运动阶段的儿童的特征主要是()。
一、注意事项1.申论考试是对应考者阅读理解能力、综合分析能力、提出和解决问题能力、文字表达能力的测试。2.仔细阅读给定资料,按照后面提出的“申论要求”依次作答。二、给定资料1.近年来,如何在不确定性面前应对突发事件已成为政府有
打开考生文件夹下的演示文稿yswg.pptx,按照下列要求完成对此文稿的修饰并保存。使用“新闻纸”主题修饰全文,将全部幻灯片的切换效果设置成“门”,效果选项为“水平”。
最新回复
(
0
)