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
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
2013-07-01
43
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. has acquired when it purchased Louisiana, and Apollo astronauts rocketed to the moon in a dramatic show thanks for 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 as humanity’s next 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
D
解析
细节题。解释可以参照上一道题,根据题干中的“人类登上火星的主要目标”可以找到第三段的第三句话:Could it be that science,which has long played a minor role in exploration,is at last destined to take a leading role?(在火星探索中,是否是科学研究起到了主导的作用?当然科学研究在以往的探索中起到的作用是微不足道的。)选项D是说去展示科学在宇宙探索中的地位。只有D与原文的意思相符合,因此答案是D。
转载请注明原文地址:https://kaotiyun.com/show/kNn7777K
0
大学英语六级
相关试题推荐
WaterprojectsintheUnitedStatesgainedanewprincipleinthe1930’s.Andduringthistimethenationsuffereditsworsteco
HowtoGetLuckyandLiveaCharmedLifeForcenturies,peoplehaverecognizedthepowerofluckandhavedonewhateverthey
A、Ridingahorse.B、Shootingamovie.C、Playingagame.D、Takingaphoto.D
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofmostnon-oilexportingAfricancountries.It【C1】______
A、Heworkedthereasaguide.B、Hereadaboutit.C、Hehadjustvisitedit.D、Heinterviewedthesculptor.B由选项可知,本题与男士的行为活动有关。对
A、Soil.B、Humanpopulation.C、Forest.D、Water.B从文章中看出有土壤、森林、水资源、动植物等方面,而没提及对人口造成的影响。
A、Theyusuallyacceptresponsibility.B、Theyblamefactorsbeyondtheircontrol.C、Theycomplainabouttheirpersonalproblems.
A、Computerliteracy.B、Englishliterature.C、TOEFLtraining.D、Chineseculture.A对话中,男士向女士咨询其公司EnglishLanguageCenter的信息;女士说他们提
MostChineseAmericansworkedinrestaurantsandlaundriesbecauseof______.ThecontributionsmadebyChinesetoAmericahadg
A、Itisthemostdifficultspellingsystemintheworld.B、ItcontainsboththeAmericanandtheBritishspelling.C、Itisthes
随机试题
社会主义与资本主义的根本区别在于
患者男性,双眼异物感及烧灼感,伴大量水样分泌物4天。结膜充血、水肿,伴片状结膜下出血,角膜上皮点状脱失,3天后形成上皮下浸润,伴有耳前淋巴结肿大和压痛。患者发病后3周,角膜上皮下浸润加剧,此时可选择的治疗方案是
原人参二醇是
A.薄荷B.荆芥C.益母草D.广藿香E.细辛具有气辛香,味辛辣,麻舌特征的药材是
甲某是某路边饭店老板,一天趁货车司机在自己饭店吃饭的时机,将货车上的贵重药材拽下两包,暂时放到离车不远的地方,然后又去招待客人。另一路过三轮车夫乙看到路边的两包东西,以为是来往司机不小心掉下的,遂将其拉走,卖款得三千元。待货车司机走后,甲再去拉药材,已不见
在成本逼近法中,投资利润的正确计算公式为()。
商品化会计软件与定点开发会计软件的最大区别在于()。
根据有关法律法规规定,输入动植物、动植物产品和其他检疫物,应当在( )实施检疫。未经检验检疫机构同意,不得卸离运输工具。
为了表现的需要,幼儿绘画时有时会出现透明的墙,让人能看见被墙遮挡的东西,这反映儿童美术的()
某化工厂因安全生产事故被安监部门作出以下处理:一是查封不符合安全生产标准的货物5000箱;二是追究公司法定代表人责任;三是罚款20000元。上述决定中属于行政强制的是()。
最新回复
(
0
)