首页
登录
职称英语
[originaltext] Science fiction writers have often imagined human beings goin
[originaltext] Science fiction writers have often imagined human beings goin
游客
2024-05-06
4
管理
问题
Science fiction writers have often imagined human beings going to live on Mars. But these days scientists are taking the idea seriously. It has a great deal to recommend it since it might solve the problem of overcrowding on the earth, but obviously it would not be worth making the effort unless people could live there naturally. If the were like that of Earth, this might be possible. But m fact, it s mostly carbon dioxide(CO2). Apart from that, there are other problems to be overcome. For example, the temperature would have to be raised from 60~C below zero to 15~C above it. Scientists who study Mars have laid down the program that they can follow. To begin with, they will have to find out whether life has ever existed on planet Mars in the past. Secondly, they will have to make a reliable map of its surface, and finally they will have to make a list of the gases. Above all, they will have to discover how much nitrogen it possesses, since nitrogen is four-fifths of the air we breathe. They’re surprisingly optimistic about raising the temperature on Mars and believe it could be done in 200 years. It would take a bit longer, though, to transform the atmosphere so that human beings could live there. Scientists estimate that this will take 100,000years.
选项
A、Because people might have to migrate there someday.
B、Because it is very much like the earth.
C、Because it is easier to explore than other planets.
D、Because its atmosphere is different from that of the earth.
答案
A
解析
语意理解题。解答本题的关键是overcrowding(人门过多),探索火星或许可以解决地球上人口过多的问题,即意味着或许有一天人们可以向火星移民,因此选项A正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3586881.html
相关试题推荐
[originaltext]Sciencefictionwritershaveoftenimaginedhumanbeingsgoin
[originaltext]Sciencefictionwritershaveoftenimaginedhumanbeingsgoin
[originaltext]Treeshaveaspectacularsurvivalrecord.Overaperiodofmo
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]M:Hi,Nancy.CouldIborrowsomemoneyuntilpayday?W:Uh,yeah
[originaltext]Studentswanttofindthebestwaytoputinformationintoth
[originaltext]Studentswanttofindthebestwaytoputinformationintoth
[originaltext]Studentswanttofindthebestwaytoputinformationintoth
[originaltext]Studentswanttofindthebestwaytoputinformationintoth
[originaltext]PublictelevisioninAmericagrewoutofthemanylocalstat
随机试题
[originaltext]W:Hello,GraceHotel.M:Listen,(l)theheatingisbrokeninmyr
[originaltext]M:Ihopeyou’llexcusemeformycomingtoclasslate.Mycarbr
"Whereistheuniversity?"isthequestionmanyvisitorstoCambridgeask.B
Halfacenturyago,mostpeoplelivedin【B1】______areas.However,according
皮影戏(shadowplay)是中国的一种民间艺术,拥有悠久的历史。皮影戏所需要的演员是用牛皮做的皮影人形,由一个或几个人控制着,并用光将它们反射到幕
下列各项中,属于对盈余公积进行实质性审查的程序有:A:了解企业利润分配的审批流程
以下说法错误的是()。A.2010年1月的零售额增幅在12个月中是最小的
新加坡国立大学社会学家波林*斯特劳恩副教授对当地已婚者和离婚者展开的调査发现,恋
(2019年真题)按照中药丸剂的特点,通常具有滋补作用的中药处方宜制成的丸剂是A
食物蛋白质的生物学价值最低的是() A.大米 B.鱼 C.黄豆 D.鸡蛋
最新回复
(
0
)