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
职业资格
US researchers have found traces of an ancient lake on Mars recently, increasing hopes of discovering evidence that billions of
US researchers have found traces of an ancient lake on Mars recently, increasing hopes of discovering evidence that billions of
admin
2016-01-25
100
问题
US researchers have found traces of an ancient lake on Mars recently, increasing hopes of discovering evidence that billions of years ago the Red planet hosted life.
The lake, which dates back some 3.4 billion years, appears to have covered as much as 80 square miles and was up to 1, 500 feet deep, said the team from the University of Colorado.
" This is the first clear evidence of shorelines on the surface of Mars, " said Boulder’s research associate, Gaetano Di Achille, in a study published in the latest edition of Geophysical Research Letters.
"The identification of the shorelines and accompanying geological evidence allows us to calculate the size and volume of the lake, which appears to have formed about 3.4 billion years ago. "
Analysis of the images has shown the water carved out the canyon(溪谷)in which it was found, which then opened out into a valley depositing(使淤积)sediment(沉积)which formed a delta(三角洲).
" Finding shorelines is a great discovery to us, " said assistant professor Brian Hynek, adding it showed the lake existed at a time when Mars was thought to have been cold and dry.
Scientists believe the oldest surfaces on Mars formed during the wet and warm era known as the Noachan epoch, about 4. 1 billion to 3. 7 billion years ago.
The newly discovered lake is believed to date from the Hesperian era and postdates the end of the warm and wet period on Mars by 300 million years, according to the study.
Scientists believe deltas next to the lake may well hold secrets about past life on Mars as such places on Earth have become the natural deposits of organic carbon and other markers of life.
Why do scientists think deltas near the lake may hold secrets about past life on Mars?
选项
A、Because similar places on Earth have become natural deposits of markers of life.
B、Because someone has put secrets about past life on Mars there.
C、Because past life has been found in other deltas on Mars.
D、Because some people are said to have already seen life marks there.
答案
A
解析
细节理解题。由原文最后一句可直接找到答案。
转载请注明原文地址:https://kaotiyun.com/show/7pCv777K
本试题收录于:
英语学科知识与教学能力题库教师资格分类
0
英语学科知识与教学能力
教师资格
相关试题推荐
Whencheckingstudents’understandingofacertainlanguagepointinclass,whichoffollowingutterancesisateacherexpected
Unlikeher______sister,Judithisashy,unsociablepersonwhodislikestogotopartiesortomakenewfriends.
Ifthepopulationoftheearthgoesonincreasingatitspresentrate,therewilleventuallynotbeenoughresourceslefttosus
JapaneseCarKeepsWatchforDrunkDriversAconceptcardevelopedbyJapanesecompanyNissanhasabreathalyzer-likedetect
Socialchangeismorelikelytooccurinsocietieswherethereisamixtureofdifferentkindsofpeoplethaninsocietieswhere
WhereisLove?HowcanwefindLove?Thepastagesofmanhaveallbeencarefullylabeledbyanthropologists.Descriptionsl
Wordcomesthatfreesouvenirswillbegivento______comesfirst.
High-qualitycustomerserviceispreachedbymany,butactuallykeepingcustomershappyiseasiersaidthandone.Shopperss
InasurveyconductedbyresearchfirmHarrisInteractive,71%ofAmericanssaidthatspendingextramoneyontravelduringthe
Inalisteningclass,ateacherasksstudentstolistentothematerialcarefullyandtrytodiscriminatethespeaker’sattitude
随机试题
夜间行车,驾驶人视距变短,影响观察,同时注意力高度集中,易产生疲劳。
维持机体稳态的重要调节途径是()
阅读格罗津斯卡的微型小说《文艺评论家和部长》,然后回答下列小题。“您看斯普罗塔新创作的小说怎么样?”部长问道。评论家回答说:“部长,我认为他创作的小说是好的。”部长摇了摇头。“我是说从某种意义上讲,他创作的小说是好的。”
何谓缺氧?可分为哪4种类型?
患者,男,50岁,骤发剧烈腹痛,初起时剑突下偏右呈发作性胀痛,迅速波及全腹呈持续性,并向后腰背放射,伴恶心、呕吐,查体:体温38.9℃,BP110/80mmHg,脉搏110/min呼吸32/min心肺检查(-),全腹彭隆,伴明显肌紧张及广泛压痛,反跳痛
下列部件中,属于全站仪主要组成部分的有()。
货币市场基金的主要特征是()。
Althoughmanhasknownasbestosformanyhundredsofyears,itwasnotuntil160yearsagothatitwasminedforthefirsttime
下列业务中不属于商业银行的表外业务是()。
在如何运用马克思列宁主义普遍原理来解决中国革命实践中的问题上,中国共产党人曾出现过的主要错误倾向有()
最新回复
(
0
)