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
40
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、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
信息明示题。文章的最后一句话明确表明了科学家预测人类大约需要100,000年才能住在火星上。所以答案选C。
转载请注明原文地址:https://tihaiku.com/zcyy/2970620.html
相关试题推荐
[originaltext]Asthetwentiethcenturybegan,theimportanceofformaledu
[originaltext]Asthetwentiethcenturybegan,theimportanceofformaledu
[originaltext]Magnificent,peaceful.Justtwowordstodescribethesceni
[originaltext]PeoplefellinlovewithElizabethTaylorin1944,whenshes
[originaltext]PeoplefellinlovewithElizabethTaylorin1944,whenshes
[originaltext]W:Hello,Michael.Wouldyoucometomyofficeforaminute?Iwa
[originaltext]W:Hello,Michael.Wouldyoucometomyofficeforaminute?Iwa
[originaltext]F:SusanBauerspeaking.M:Dr.Bauer,mynameisTomWhite.Myr
[originaltext]F:SusanBauerspeaking.M:Dr.Bauer,mynameisTomWhite.Myr
[originaltext]W:Howdoyoulikeyournewtenantwhomovedtoyourapartmentla
随机试题
•Readtheannualreportaboutacompany.•Choosethebestwordtofillineach
Whatisthemainpurposeofthispassage?[br]An"internalcomputer"(Para.2)i
ThelocalPeulpeopleareherders,oftennomadic.当地的颇耳族人(Peul)都是牧民,且常常过着游牧生活。本句中
______theprojectonemonthearlier,theydecidedtoapplyforanawardtothe
SputnikIwasthefirstartificialsatellite.Itcanbedescribedasanalum
LikemanyoftheprotestersatOccupyWallStreetinNewYork,AmandaVodola
某业主(甲方)与某工程公司(乙方)订立了施工合同,同时与某指定承包人订立了设备供
以下()不属于证券交易所无法连续交易的情形。 A.证券交易所交易、通信系统出
下列关于贷款意向书与贷款承诺的说法中,正确的有()。A.贷款意向书和贷款承诺都
在R=9kΩ,L=9H,C=1μF三个元件串联的电路中,电路的暂态属于下列哪种类
最新回复
(
0
)