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
Ancient Water From Afar It streaked across the sky on a warm March evening last year, then crashed into a street in the sma
Ancient Water From Afar It streaked across the sky on a warm March evening last year, then crashed into a street in the sma
admin
2010-01-14
19
问题
Ancient Water From Afar
It streaked across the sky on a warm March evening last year, then crashed into a street in the small town of Monahans, Texas. When seven boys quit their basketball game to inspect the damage, they found a shiny, black grapefruit-size rock settled in the asphalt (沥青). Word of the “flaming rock” traveled quickly in newspapers and on TV. The next day, NASA scientist Everett Gibson arrived and took the meteorite(陨石) , later named Monahans 1998, back to a lab in Houston. There researchers broke open the extraterrestrial (地球外的)rock with a hammer and chisel (凿子). To their surprise, they struck water. A team led by Michael Zolensky of the Johnson Space Center reports this discovery in a journal. It’s the first time anyone has found liquid water in an object from space—and a suggestion that life may exist out side our planet.
Meteorites containing water are probably not scarce, Zolensky says. But by the time researchers get their hands on the rocks, minerals that trap the water have dissolved away, and the water have evaporated. Worse, some researchers destroy the evidence by cutting meteor ites open with rock saws and water. “I’m betting this isn’t such a rare finds it’s just that people have been mistreating their meteorites,” Zolensky says.
Of course, Zolensky’s team did get a bit lucky. Monahans 1998 was safe in their lab less than two days after it hit the Earth, so they examined an unusually fresh sample. The scientists were keen to find vivid purple crystals of halite (岩盐)inside the meteorite, since halite is a salt mineral usually formed from liquid water. Even more curious were the hundreds of tiny bubbles suspended in the halite crystals. Zolensky’s team analyzed the bubbles by shining a laser beam through them and confirmed they were made of salty brine (盐水).
By dating the halite, Zolensky’s team found the water trapped inside it formed at least 4.5 billion years ago, back when most scientists believe our solar system was born. That means the briny object amy help researchers learn about the gaseous nebulas(星云)that gave rise to our sun and planets.
But how did the meteorite get wet? One possibility is that a passing comet smashed into the rock, dropping off a load of liquid water. Or the rock might have chipped off an asteroid (小行星)that holds pools of fluid. Zolensky’s team still needs to study whether the water comes from our own solar system. One thing is certain, however: the Monahans meteorite will fuel the debate on extraterrestrial life, “Water is a life-giver, so if you want to study where life came from in the solar system, you have to follow where water came from,” Zolensky says. A wet rock from space doesn’t mean little green men are coming soon to a planet near you, but it does raise hopes that we’re not alone in the universe.
The Johnson Space Center reported the discovery in the journal Newsweek.
选项
A、Right
B、Wrong
C、Not mentioned
答案
C
解析
原文并未明确指出哪种报纸,更未提到Newsweek一词。
转载请注明原文地址:https://kaotiyun.com/show/UMhd777K
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
Accordingtothepassage,whichofthefollowinghaschangedthemostinthelast500years?Whichcountryisthelargestcoffe
A.Whatcausesautism?B.Howcommonisautism?C.Doesautismoccurtogetherwithotherdisabilities?D.Whatisthedifference
IrradiatedFoodIrradiating(照射)fruits,vegetable,porkandchickentokillinsectsandbacteriahasbeenapprovedbytheFo
A.diseasepreventionB.healtheducationC.healthybehaviorD.unhealthybehaviorE.otherhealthservicesF.manyvaccine
Anumberoftheorieshavebeenproposedtoexplainthesituation
WaterResourceMorethanhalfofthewaterusedfordrinking,washingandirrigatingcomesfromundertheground.Thissubte
Theauthor’sprimarypurposeis______。Accordingtoauthor,whenadoctortellsapatientsto"returnnextWednesday,doctoris
William,whoconqueredEnglandsome930yearsago,hadwealth,powerandaruthlessarmy.YetalthoughWilliamwasstupefyingly
ViennaViennawasoneofthemusiccentersofEuropeduringtheclassicalperiod,andHaydn,Mozart,andBeethovenwereall
随机试题
政策议程的动员模型通常出现于()
一年轻女性,月经过多2年,发现下腹部包块3个月。妇检:宫颈光滑,子宫增大如男拳大小,活动,双侧附件区(—)。B超提示子宫巨大肌瘤。行子宫切除术,术后48小时拔尿管后,尿液自阴道流出半年。损伤性尿瘘行修补的时间是()
企业集团的作用包括:()。
《航道建设管理规定》第三十一条规定航道建设项目单位以及其委托的()、主要负责人员,应当具备满足拟建项目管理需要的技术和管理能力。
将y=sinx展开为的幂级数.
广域网中采用的交换技术大多是()。
Host:John,comeandsitinthesofa.Dinnerwillbereadyinaminute.CouldIgetyousomethingtodrink?Guest:________
SomeProblemsFacingLearnersofEnglishAlthoughmanyEnglishlearnershavegothighscoresinanEnglishtestsuchasIELTS
A.primeB.addedC.byD.reproductiveE.excessiveF.takeG.extendsH.producingI.adultJ.provesK.onaverageL.
A、Heloseshisdelightindreamswhenhehashorribledreams.B、Hestillfeelsfuntodreamalthoughhemighthavesomehorrible
最新回复
(
0
)