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
71
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.
How many researchers does the passage mention?
选项
A、Two.
B、Three.
C、Four.
D、Five.
答案
A
解析
细节理解题。通读全文,可知共有两个研究人员,即Gaetano Di Achille和Brian Hynek。
转载请注明原文地址:https://kaotiyun.com/show/KpCv777K
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
教师在教学中引用史料应遵从适切性原则,为此应该重点考虑哪些方面?
Whenastudentsaid"YesterdayIgoedtoseeafriendofmine",theteachercouldrespondwiththefollowingsentencesEXCEPT___
Thecitygovernmentisbuildingmoreroadsto______theincreasingnumberofcars.
Respectisnotincludedinthemarriagevows.Noillustratedbooksshowhowtoachieveit.Andyetitiscentraltoalasting,s
Inalisteningactivity,studentsareaskedtonotedownthetimeandplacesofevents.Theaimofthisactivityistodevelopt
InspiteofallstoriesofprosperityintheUnitedStates,notonlydoespovertyexistthere,butcrimesofvarioustypeshave
______,thethirdlargestcityinCanada,iswellknownasIce-FreeHarbor.
Consumersarebeingconfusedandmisledbythehodge-podge(大杂烩)ofenvironmentalclaimsmadebyhouseholdproducts,accordingto
AChinesestudentmakesasentenceasfollows"Heisarichmanwholiketraveling".Theerrorinthatsentenceistheresultof
Georgetook______ofthefineweathertodoaday’sworkinhisgarden.
随机试题
男性,34岁。腰痛1年余.近半年膝踝关节疼痛,伴尿频、尿痛。查体:结膜充血,双肾无叩击痛,膝踝关节肿胀有压痛。化验:HLA-B27(+)。尿WBC20~30/HP,管型(一)。此病人最可能的诊断是
患者,女,38岁。慢性腹泻已五年余,大便每日2~3次,稀便不成形,纳呆,腹胀,周身乏力,消瘦,舌淡苔白、脉缓,临床诊断最可能是
确定施工导流的标准依据的指标有()。
审计风险取决于重大错报风险和检查风险,下列表述中正确的是()。
教师在教学中的主导作用就是充分调动学生的积极性。()
直肠内镜检查最危险的并发症是
Therangeandqualityof【C11】______emotionsarepotentiallythesameforallhumangroups.Inthecourseof【C12】______inaparti
ARideinaCable-carArideinacable-carisoneoftheexcitingandenjoyableexperiencesachildcanhave.InSwitzerland
I______onseeingthemanager.Theserviceinthishotelisterrible.
穿上风情的旗袍,迈着小凤仙的步子,一个女人最美丽的日子流转在房间里,来世今生,恍如隔世。
最新回复
(
0
)