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
If our solar system has a Hell, it’s Venus. The air is choked with foul and corrosive sulfur, heaved from ancient volcanoes and
If our solar system has a Hell, it’s Venus. The air is choked with foul and corrosive sulfur, heaved from ancient volcanoes and
admin
2017-02-01
47
问题
If our solar system has a Hell, it’s Venus. The air is choked with foul and corrosive sulfur, heaved from ancient volcanoes and feeding acid clouds above. Although the second planet is a step farther from the sun than Mercury, a runaway greenhouse effect makes it hotter indeed It’s the hottest of the nine plants, a toasty 900 degrees Fahrenheit of baking rocky flats from equator to poles. All this under a crushing atmospheric pressure 90 times that of where you’re sitting now. From the earthly perspective, a dead end. It must be lifeless.
"Venus has nothing," is the blunt word from planetologist Kevin Zahnle of NASA Ames Research Center in California’s Silicon Valley. "We’ve written it off."
Yet a small group of advanced life-forms on Earth begs to differ, and theorizes that bizarre microbial ecosystems might have once populated Venus and, in fact, may be there still. Members of this loose band of researchers suggest that their colleagues have water too much on the brain, and are, in a sense, H
2
O chauvinists(盲目的爱国者).
"Astrobiologists are neglecting Venus due more to narrow thinking than actual knowledge of the environment, or environments, where life can thrive," says Dirk Schulze-Makuch, a geobiologist at the University of Texas at El Paso who recently co-authored a Venus-boosting paper in Astrobiology with colleague Louis Irwin.
The bias against life on Venus is partly rooted in our own biology. Human experience instructs that liquid water, preferably lot of it, is essential for life. In search for extraterrestrial life, we obsess over small rivers in Mars’ surface apparently carved by ancient gushes of water, and delight in hints of permafrost(永久冻结带)just underneath its surface.(By comparison, Venus isn’t even that interesting to look at: A boring cue ball(台球的白色母球)for backyard astronomers, its clouds reflects 75% of visible light.)Attention and then funding follow the water: Three more landers will depart for Mars this spring, and serious plans for sample-return missions hover in the midterm future.
"If you have limited resources, you base exploration on what you know," says Arizona State University planetary geologist Ronal Greeley. It’s like losing your keys on the way home at night: The first place you look is under the streetlights not because they’re more likely to be there, but because if they are, you’ll spot them. For astrobiologists, the streetlights are the spectral(光谱的)lines for water, and they’ve spotted that potential on Mars, Jupiter’s moon Europa, even Neptune’s moon Triton. Not on the baking rocky flats of Venus.
It can be inferred from the passage that the small group of advanced life-forms on Earth believed that_____.
选项
A、life could exist in hot environment
B、life could exist without water
C、there are still lives on Venus
D、there used to be lives on Mars
答案
B
解析
第3段末句表明,这一个小团体的研究人员认为那些宣称Venus上没有生命的科学家是H
2
O chauvinists(即他们太盲目认为水是生命存在的基本条件。)也就是说,这个团体相信生命的存在不一定需要水,因此B为本题答案。A无原文依据,C、D将文中并不肯定的猜测(might,may)转变为肯定的事实,显然不符。
转载请注明原文地址:https://kaotiyun.com/show/5lF7777K
0
大学英语六级
相关试题推荐
Languageistheroadmapofaculture.Ittellsyouwhereitspeoplecomefromandwheretheyaregoing.AstudyoftheEnglish
Onewouldthinkthatbynowmostpeoplewouldhave【B1】______thatclimatechangerepresentsagravethreattotheplanet.Onewou
Americannewspapersarereportingwhatsomepeoplefearistheslowdeathoftheirownindustry.Newspapersearnmostoftheirm
Overtheyears,relaxationtraininghasbeenrecommendedtopatientswithvariousstress-relateddisorderssuchaschronicpain
Dohalfofallmarriagesreallyendindivorce?It’sprobablythemostoften【B1】_____statisticaboutmodernlove.Butinanupbe
A、Itisbasedontheinterviewswithpopularsingers.B、Itistointroducesomefamoussongwriters.C、Ithelpstounderstandthe
A、Getpreparedforherfirstcampusinterview.B、Polishherresumeformorejobopportunities.C、VisitafamousElectronicscomp
Fertilizerusehasexploded,overloadingplantsworldwide,likelyalteringecosystemsfordecadestocenturies,scientistsrepor
DoBritain’sEnergyFirmsServethePublicInterest?[A]Capitalismisthebestandworstofsystems.Lefttoitself,itwillemb
A、Shewasreplacedbyanotheremployee.B、Shewasfiredbyherlastboss.C、Shecouldn’tfindroomforimprovement.D、Shecouldn
随机试题
Shoppingforclothesisnotthesameexperienceforaman【C1】______itisforawoman.Amangoesshoppingbecauseheneedssomet
A.脱氢、硫解、加水、再脱氢B.缩合、加氢、脱水、再加氢C.脱氢、加水、再脱氢、硫解D.加氢、缩合、脱水、再加氢软脂酸合成的循环步骤是
涎石病好发于
清朝对于其统治疆域内不同民族居住地方采取各依本俗的民族分立政策。对于蒙古地方发生的案件,适用的法律是()。
风险价值(VAR)指标相对于其他衡量风险的指标来说,具有的优势是()。
请根据《普通高中音乐课程标准(2017年版)》的基本理念,按照下列要求进行教学设计。教学对象:必修“音乐歌唱”模块的学生教学内容:学唱《洪湖水,浪打浪》要求:(1)设定教学目标与重点。(2)针对教学重点,设
此刻,我们经历的时光,将来都会变成从前。时光如落花,盛开时我们忽略它的美,反而在它凋落之时嗅到它的余香,不只是爱情,所有的事,都是如此。我们拥有的时候,往往是漠然的,等到一切成为从前,才恍然觉得珍贵。对这段文字概括最恰当的是()
下列属于社会发展道路统一性的有( )
假定a=3,下列程序的运行结果是()。#includeintfun(intn);voidmain(){couta;result=fun(a);tout
Fromthebeginning,America,anationofimmigrants,welcomedpeopledesiringfreedomandanewstart.However,thecomingtoget
最新回复
(
0
)