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
2023-09-10
12
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 atmosphere were like that of the earth, this might be possible. But in fact it is mostly carbon dioxide. Apart from that, there are other problems to be overcome. For example, the temperature Would have to be raised from 60 degrees below zero to 15 degrees 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 the planet of 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 are surprisingly optimistic about raising the temperature on Mars and believe it could be done in two hundred years. It Will take a bit longer, though, to transform the atmosphere so that human beings, could live there. Scientists estimate that this will take one hundred thousand years.
选项
A、Man will probably be able to live there in 200 years.
B、Scientists are rather pessimistic about it.
C、Man will probably be able to live there in 100,000 years’ time.
D、Scientists are optimistic about overcoming the difficulties soon.
答案
C
解析
本题考查人类移居火星的前景(prospect)。根据短文末句Scientists estimate that this will take one hundred thousand years可知,人类可能100,000年之后才能移居火星,因此C为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3001940.html
相关试题推荐
[originaltext]AccordingtoanewstudydoneattheMedicalSchoolofUniver
[originaltext]AccordingtoanewstudydoneattheMedicalSchoolofUniver
[originaltext]AccordingtoanewstudydoneattheMedicalSchoolofUniver
[originaltext]Acommunitytheatreisanimportantpartofalmosteverycity
[originaltext]Acommunitytheatreisanimportantpartofalmosteverycity
[originaltext]M:Excuseme.Iwonderifyoucouldhelpme.Thereferencelibrar
[originaltext]M:Excuseme.Iwonderifyoucouldhelpme.Thereferencelibrar
[originaltext]M:Excuseme.Iwonderifyoucouldhelpme.Thereferencelibrar
[originaltext]M:Congratulations.YoucertainlydidquitewellandImustsayy
[originaltext]M:Congratulations.YoucertainlydidquitewellandImustsayy
随机试题
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
[audioFiles]audio_eusm_j01_071(20099)[/audioFiles]A、Sheleftthelecturefora
陈女士,45岁,近日感到双腿关节疼痛,行走、提重物和在上楼时疼痛加剧。因多日未愈
上市公司推出股权激励计划时,可以设置预留权益,预留比例不得超过该次股权激励计划拟
教师资格证面试姿态的基本原则是端正、精神焕发,给考官以清新振奋的感觉。具体而
2011年上半年,我国软件产业实现软件业务收入8065亿元,同比增长29.3%,
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
图示均质圆盘放在光滑水平面上受力F作用,则质心C的运动为: A.直线 B.曲
应激本身没有致痛能力,但是流行病学调查发现,长期应激与疼痛慢性化的发生正相关,即
与商业信用筹资方式相配合的筹资渠道是()A.银行信贷资金 B.政府财政资金
最新回复
(
0
)