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
2010-11-02
78
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.
At present, a probable inducement for countries to initiate large-scale space ventures is______.
选项
A、international cooperation
B、nationalistic reasons
C、scientific research
D、long-term profits
答案
C
解析
推理判断题。作者在第三段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 nation
转载请注明原文地址:https://kaotiyun.com/show/hys7777K
0
大学英语六级
相关试题推荐
Directions:Forthispart,youareallowed30minutestowriteacompositiononthetopicTheEffectsofCompliments.Youshould
Thereisatimewhenjobseekerssimplywrotelettersofapplication."Justputdownyourname,【B1】______,ageandwhetheryou
Nooneshouldbeforcedtowearauniformunderanycircumstance.Uniformsaredemandingtothehumanspiritandtotallyunneces
Mostlarge-scale,objectivemeasuresofmen’srolesshowlittlechangeoverthepastdecade,butmendofeelnowandthenthatt
A、Becausetheirenvironmentisbecomingmoreandmoredirty.B、Becausethetraditionalwaysoftreatingwastesarenotefficient
A、Husbandandwife.B、Teacherandstudent.C、Fatheranddaughter.D、Friends.D
A、Becausemanypeopledon’tknowhowtobehaveinsocialsituations.B、Becausemostpeopleareshybynature.C、Nobodywilllaug
Theseaisthelargestunknownpartofourworld.Itcovers【B1】______percentoftheearth.Thereisstillmuchtobediscovered
A、Angry.B、Hungry.C、Tired.D、Dissatisfied.C关键词汇:I’mbeat;表示该男士听从了建议,准备睡觉了。因此对应态度应为tired。
Togetachocolateoutofaboxdemandsaconsiderableamountofunpacking:theboxhastobetakenoutofitspaperbagthepla
随机试题
Whatisthesubjectofthisconversation?
关于骶骨的描述正确的是
甲药品零售企业的经营类别有药品、医疗器械、保健食品,其药品经营许可证的经营范围有中药饮片、中成药、化学药制剂、抗生素制剂。2016年初,甲企业的采购人员发现原来本企业一直可以购进的A药不能再购进了,经查实,A药属于2015年新列入兴奋剂目录的肽类激素,同时
按照不同的分类标准,可将假山作如下分类:按施工方式分,按假山在园林中的位置和用途分。以下哪种不是依照施工方式进行的分类()。
《注册建造师执业工程规模标准》规定的专业标准是()。
用线条勾勒出罗中立油画作品《父亲》的构图样式、主体形象及标志性细节,并简述其艺术特色。
(2013广东)2012年,某省加大扶持贫困残疾人力度,财政投入扶贫资金3816.3万元,比上年大幅增长18%,扶持贫困残疾人员56561人,脱贫35110人,享受优惠政策的贫困残疾人117727人,比上年增加3%。该省每年投入的残疾人财政扶贫资金如果可
(上海财大2017)RAROC指经风险调整的收益率,常用净收益与经济资本的比值来衡量。某笔贷款的相关风险要素为:违约概率30个基点,违约损失率50%,违约风险暴露为150万元,该笔贷款的收益为1万元,假设经济成本为违约风险暴露的5%,求该笔贷款的RAROC
Thedeanaskedthesecretaryiftherewereenoughpeople,______toholdafacultymeeting.
Trafficaccidentisreported______thenumber-onekillerofmenoverthepastfewyearsinthislittlietown.
最新回复
(
0
)