首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Man will probably be able to live there in 200 years. B、Scientists are rather pessimistic about it. C、Man will probably be abl
A、Man will probably be able to live there in 200 years. B、Scientists are rather pessimistic about it. C、Man will probably be abl
admin
2010-08-21
69
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://kaotiyun.com/show/nr7K777K
0
大学英语六级
相关试题推荐
A、Hewillprobablyoverchargeher.B、Heisoneofherneighbors.C、Heonlyworksonnewcars.D、Hehasfixedhercarbefore.D细节
Mathematicalabilityandmusicalabilitymaynotseemonthesurfacetobeconnected,butpeoplewhohaveresearchedthesubject
A、Afloodwallwasbuilt.B、Rescueteamswereformed.C、Analarmsystemwassetup.D、50undergroundstationsweremadewaterpro
PresidentClintonlatertodayjoins【B1】______presidentFord,CarterandBushat"thepresident’ssummitforAmerica’sfuture"【B
PresidentClintonlatertodayjoins【B1】______presidentFord,CarterandBushat"thepresident’ssummitforAmerica’sfuture"【B
Informationabouttigersharksisrareinbookssomostofthispaperaboutsharkswillbeingeneral.TheTigerSharks’Latinn
GreenhouseEffectⅠ.IntroductionGreenhouseEffect,thecapacityofcertaingasesintheatmospheretotrapheatemittedfr
EightTipsforEatingWellAhealthybalanceddietcontainsavarietyoftyposoffood,includinglotsoffruit,vegetables
SeveralmembersoftheFOMCarguethatinpracticetheFedandothercentralbankshaverespondedto______.(飙升的房价)insimilarwa
______(这样的大雨天无论是谁在外面行走)willcatchacold.
随机试题
预决算调整法是以待估建筑物预决算资料中的___为基础进行现行价格的调整而确定评估值的。()
属于G蛋白耦联受体的是
下列哪些情形下,合议庭成员不承担责任?(2013年卷二第73题)
P1、P2、P3…Pn是城市按人口规模从大到小排序后某位序城市的人口,通常所说的“四城市指数”是()城市人口的比值。
根据《公司法》司法解释(三)的规定,股东在公司设立时未履行或者未全面履行出资义务的,()对未履行的出资义务负有履行责任。
个人质押贷款发放后,()的业务部门留存联应该返回信贷部门存档。
根据下列资料,回答问题。据统计,2016年共有来自205个国家和地区的442773名各类外国留学人员在31个省、自治区、直辖市的829所高等学校、科研院所和其他教学机构中学习,比2015年增加45138人。1.按洲别统计2.按国别排
在华外资金融机构将逐步建立以中外合资银行为主的结构体系。()
新中国成立初期,为加强执政党建设,在全党范围开展的重大举措主要有()
如果项目A的净现值为30000元,项目B的净现值为50000元,那么选择B的机会成本是()元。
最新回复
(
0
)