首页
登录
职称英语
[originaltext] While some scientists explore the surface of Antarctica, other
[originaltext] While some scientists explore the surface of Antarctica, other
游客
2023-08-08
68
管理
问题
While some scientists explore the surface of Antarctica, others are learning more about a giant body of water four kilometers beneath the ice pack. Scientists first discovered Lake Vostok in the 1970s by using radio waves that penetrate the ice. Since then they have used sound waves and even satellites to map this massive body of water.
How does the water in Lake Vostok remain liquid beneath an ice sheet? The thick glacier above acts like an insulating blanket and keeps the water from freezing, says Martin Siegert, a glaciologist from the University of Wales. In addition, geothermal heat from deep within the Earth may warm the hidden lake. The scientists suspect that micro-organisms may be living in Lake Vostok, closed off from the outside world for more than two million years. Anything found there will be totally alien to what’s on the surface of the Earth, says Siegert. Scientists are trying to find a way to drill into the ice and draw water samples without causing contamination. Again, robots might be the solution. If all goes as planned, a drill-shaped robot will melt through the surface ice. When it reaches the lake, it will release another robot that can swim in the lake, take pictures and look for signs of life. The scientists hope their discoveries will shed light on life in outer space which might exist in similar dark and airless conditions. Recently, close-up pictures of Jupiter’s moon Europa showed signs of water beneath its icy surface. Once tested in Antarctica, robots could be sent to Europa to search for life there, too.
Questions 9 to 11 are based on the passage you have just heard.
9. What did scientists first use to discover Lake Vostok in the 1970s?
10. What do scientists think about Lake Vostok?
11. What do the scientists hope their discoveries will do?
选项
A、Help understand life in freezing conditions.
B、Help find new sources of fresh water.
C、Provide information about other planets.
D、Shed light on possible life in outer space.
答案
D
解析
细节辨认题。短文最后提到,科学家们希望他们的发现能够为外太空存在生命提供线索,它们可能存在于类似的黑暗和真空环境中。
转载请注明原文地址:http://tihaiku.com/zcyy/2908552.html
相关试题推荐
[originaltext]Objectsthatarevibratingmakesounds.Rhythmicsoundvibrations
[originaltext]Objectsthatarevibratingmakesounds.Rhythmicsoundvibrations
[originaltext]Inorderforachemicaltobeconsideredadrug,itmusthavethe
[originaltext]Hi,everybody.AsIsaidinmyStateoftheUnionaddress,weliv
[originaltext]IntheUnitedStates,manypeopleoncelivedinlarge,two-and-th
[originaltext]IntheUnitedStates,manypeopleoncelivedinlarge,two-and-th
[originaltext]Easterisamixofthreetraditions:Pagan,HebrewandChristian.
[originaltext]Easterisamixofthreetraditions:Pagan,HebrewandChristian.
[originaltext]Easterisamixofthreetraditions:Pagan,HebrewandChristian.
[originaltext]W:2millionhighschoolseniorsaregearingupthisfalltoappl
随机试题
Inmanystates,budgetrequestsbystateuniversitieshavehadtobescaled
Theiow-cost’carrierraisedpricesby13%inthefirsthalf.Istheeraof
【B1】[br]【B7】[audioFiles]audio_eufm_j09_007(20082)[/audioFiles]firmly
SeveralyearsagoIwasteachingacourseonthephilosophicalassumptionsa
假设商业银行的一个资产组合由相互独立的两笔贷款组成(如下表所示),则该资产组合一
评价医德行为善恶的根本标准是()A.患者的个人意见B.有利于患者康复、有利于医
患儿,男,14岁。读书成绩差,经常不完成作业,在学校常打骂同学,在家却非常听话和
(2018年真题)在商业银行依法收贷过程中,按照法律规定,以下关于仲裁和诉讼时效
对于非施工单位原因造成的工程质量缺陷,()应核实修复工程费用,签认工程款支付证
患儿,女,8岁,因反复水肿、尿少4周入院。查:血压90/68mmHg,尿蛋白(+
最新回复
(
0
)