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
考研
For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic an
For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic an
admin
2012-01-30
36
问题
For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic and nationalistic. Columbus went west to look for better trade routes to the Orient and to promote the greater glory of Spain. Lewis and Clark journeyed into the American wilderness to find out what the U.S. had acquired when it purchased Louisiana, and the Apollo astronauts rocketed to the moon in a dramatic show off technological muscle during the cold war.
Although their missions blended commercial and political-military imperatives, the explorers involved all accomplished some significant science simply by going where no scientists had gone before.
Today Mars looms (隐约出现) as humanity’s next great terra incognita (未探明之地). And with doubtful prospects for a short-term financial return, with the cold war a rapidly fading memory and amid a growing emphasis on international cooperation in large space ventures, it is clear that imperatives other than profits or nationalism will have to compel human beings to leave their tracks on the planet’s reddish surface. Could it be that science, which has long played a minor role in exploration, is at last destined to take a leading role? The question naturally invites a couple of others: are there experiments that only humans could do on Mars? Could those experiments provide insights profound enough to justify the expense of sending people across interplanetary space?
With Mars the scientific stakes are arguably higher than they have ever been. The issue of whether life ever existed on the planet, and whether it persists to this day, has been highlighted by mounting evidence that the Red Planet once had abundant stable, liquid water and by the continuing controversy over suggestions that bacterial fossils rode to Earth on a meteorite (陨石) from Mars. A more conclusive answer about life on Mars, past or present, would give researchers invaluable data about the range of conditions under which a planet can generate the complex chemistry that leads to life. If it could be established that life arose independently on Mars and Earth, the finding would provide the first concrete clues in one of the deepest mysteries in all of science: the prevalence of life in the universe.
What is the main goal of sending human missions to Mars?
选项
A、To find out if life ever existed there.
B、To see if humans could survive there.
C、To prove the feasibility of large-scale space ventures.
D、To show the leading role of science in space exploration.
答案
A
解析
本题为细节题。选择依据为第4段第2句话。文章中找不到B、C两项的意思。至于D项,科学目的在太空探索中具有重要意义,是其主要目的,但人类登陆火星并不是为了显示科学目的在太空探索中的重要意义。
转载请注明原文地址:https://kaotiyun.com/show/37Yi777K
本试题收录于:
GCT工程硕士(英语)题库专业硕士分类
0
GCT工程硕士(英语)
专业硕士
相关试题推荐
成某(男,19岁)与张某(男,17岁)原系初中同学。成、张二人初中毕业后,一直待在家里,没有上班。成、张二人具有赌博、盗窃等恶习。2005年5月16日夜晚,成、张二人打起了初中时本班校花林某(16岁)的主意,预谋强奸林某。于是,成某、张某当晚约林某出来,谎
Schoolsecretary:Goodmorning.CanIhelpyou?Student:Yes,I’dliketoenrollformecourse.Schoolsecretary:______
Ihaveaninfatuation(迷恋)withautumn.Thecolorsoftheseason,andthesmells,havealwaysthrilledme.Ihavealwaysfoundjo
Asearlyas1637,Ohiomadeadecisionthatfreetaxsupportedschoolsmustbeestablishedineverytown______40householdsorm
Withoutproperlessons,youcould______alotofbadhabitswhenplayingthepiano.
Plantswillemitanincreasedamountofheatwhentheyare______.Theapplicationofinfraredscanningtechnologytoagricultu
Plantswillemitanincreasedamountofheatwhentheyare______.Farmerscansaveaconsiderableamountofpesticideby_____
Istheresomethingastruth?Foragoodmanycenturies"thesearchfortruth"hasbeen【B1】thenoblestactivityofthehumanmind
Cancellationoftheflight______manypassengerstospendthenightattheairport.
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehumans,plantscanhavethei
随机试题
求y"+6y’+13y=0满足y(0)=3,y’(0)=一1的特解.
隐睾症常伴有
对使用甘露醇脱水治疗的患儿的护理措施不包括
A.龋均B.CPIC.Dean指数(氟牙症指数)D.简化口腔卫生指数E.龈沟出血指数氟牙症调查WHO推荐使用
HIV的感染途径不包括()
每一期的IM含有
特殊的普通合伙企业是指以专业知识和专门技能为客户提供有偿服务的专业服务机构。特殊的普通合伙企业名称应当标明“特殊普通合伙”字样。()
建筑风格指建筑设计中在内容和外貌方面所反映的特征,主要在于建筑的平面布局、形态构成、艺术处理和手法运用等方面所显示的独创和完美的意境。建筑风格因受时代的政治、社会、经济、建筑材料和建筑技术等的制约以及建筑设计思想、观点和艺术素养等的影响而有所不同。
房屋承建商如何最容易地证明其遵循了监管新建筑的建筑规则呢?通过在制定技术指标时使用规则制定者认为适当的确定技术可以做到这一点。但不幸的是,这意味着建筑行业中永远不会有任何明显的技术创新。下面哪项如果正确,会对上述结论提出最严重的质疑?
(2003年)设函数y=y(χ)在(-∞,+∞)内具有二阶导数,且y′≠0,χ=χ(y)是y=y(χ)的反函数.(1)试将χ=χ(y)所满足的微分方程=0变换为y=y(χ)满足的微分方程;(2)求变换后的微分方程满足初始条件y(0)=0
最新回复
(
0
)