2017年6月英语六级阅读训练122

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　　距离2017年5月英语四六级口语考试还有3天的时间，不知道各位考生是不是已经准考好了呢？文都四六级小编会一直陪伴着大家！给大家总结2017年6月英语六级考试备考知识点。英语六级考试中六级阅读所占比重为百分之三十五，阅读训练的重要性不言而喻，然而阅读技巧也是一门学问。来看看四六级考试网小编为各位整理的英语六级阅读训练(122)——太空探索，请考生及时练习！
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　　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 of technological muscle during the cold war.
　　Although their missions blended commercial and political-military imperatives,the explorers involved all accomplished some science simply by going where no scientists had gone before.
　　Today Mars looms 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 in vites a couple of others:Are there experiments that only human could do on Mars?Couldthose 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 thatthe Red Planet once had abundant stable,liquid water and by the continuing controversy over suggestions the bacterial fossils rode to Earth on a meteorite(陨石)from Mars.A mor 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.
　　1.For What purposes did the explorers go the unknown places in the past?
　　2.In the exploration of Mars,_______________________still remains uncertain.
　　3.What has long been regarded as unimportant in the past explorations?
　　4.What has been found on a meteorite from Mars?
　　5.The conditions under which life originates would be revealed with the proof of_________________on Mars.
　　【参考答案】
　　1.For economic and nationalistic purposes.
　　2.the prospects for a short-term financial return
　　3.Science.
　　4.Bacterial fossils.
　　5.life
　　以上就是文都四六级考试网小编为各位考生整理的关于2017年6月英语六级阅读训练，小编希望大家能顺利的取得好成绩~
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