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
2023-08-30
54
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、Its chemical elements must be studied.
B、Its temperature must be lowered.
C、Big spaceships must be built.
D、Its atmosphere must be changed.
答案
D
解析
细节推断题。短文用虚拟语气表明了人类居住在火星上所需的条件,即必须要改变火星上的空气,使之与地球一样,所以答案选D。
转载请注明原文地址:https://tihaiku.com/zcyy/2970618.html
相关试题推荐
[originaltext]Imaginethis:youwakeupeachmorningtofindyoursisterlyi
[originaltext]W:Theairqualityinthiscityishorrible!Thepollutionlevels
[originaltext]W:Theairqualityinthiscityishorrible!Thepollutionlevels
[originaltext]M:Hey,Sally!Areyougoingtostayinthatbathroomfortheres
[originaltext]M:Hey,Sally!Areyougoingtostayinthatbathroomfortheres
[originaltext]Musicwhichisoriginalisindividualandpersonal.Thatist
[originaltext]Musicwhichisoriginalisindividualandpersonal.Thatist
[originaltext]Musicwhichisoriginalisindividualandpersonal.Thatist
[originaltext]Theideaoffightinganoisebymakingmorenoisesoundsstra
[originaltext]Thewintergift-givingseasonisresponsiblefortwentyperc
随机试题
AdamSmithwasthefirstpersontoseetheimportanceofthedivisionofthe
[img]2018m9s/ct_etoefz_etoeflistz_201808_0042[/img][br]Whichofthefollowing
灭菌能力强,公认为最可靠的灭菌方法是()A.干热灭菌法 B.热压灭菌法 C
毛泽东于1928年12月主持制定的中国共产党历史上第一个土地法是()A.《井冈山
内部审计师在对采购环节进行审计时发现了以下信息,则根据下列信息能够得出采购环节控
肺"通调水道"依赖的功能是()A.主-身之气 B.司呼吸之气 C.朝百
下列各项,不属葡萄胎排出后随访内容的是()A.定期做妇科检查 B.至
路基加高处理时,为了确保压实度,使之与经过长期营运的旧路基相适应,每层填土的厚度
房源不仅包括委托出售或出租的房屋,还包括该房屋的( )。A、经纪人 B、
关于2012年中秋、国庆黄金周期间的旅游情况,下列说法正确的是:() A.
最新回复
(
0
)