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、The way to ensure the survival of the human race on Venus. B、The way to breed organisms on Venus. C、The way to reduce the popu
A、The way to ensure the survival of the human race on Venus. B、The way to breed organisms on Venus. C、The way to reduce the popu
admin
2010-08-21
57
问题
If the population of the Earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on Earth will make it necessary for us to look for open space somewhere else.
An American scientist, Professor Carl Sagan, believes that before the earth’s resources are completely exhausted, it will be possible to change the atmosphere of Venus and so create a new world almost as large as Earth itself. The difficulty is that Venus is much hotter than the Earth and there is only a tiny amount of water there.
Sagan proposes that algae, an organism that can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will than fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler but before man can set foot on Venus, it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like Earth will be reproduced on Venus.
选项
A、The way to ensure the survival of the human race on Venus.
B、The way to breed organisms on Venus.
C、The way to reduce the population of the Earth.
D、The way to conquer the universe.
答案
A
解析
该题问“文章谈论的主要话题是什么?”文章开头就提及“Even if scientists develop new ways of feeding the human race, the crowded conditions on Earth will make it necessary for us to look for open space somewhere else.”而后谈到在金星生存的可能性。因此,A项“人类正金星生存的方法”是正确的。
转载请注明原文地址:https://kaotiyun.com/show/Kt7K777K
0
大学英语六级
相关试题推荐
A、Theyspentthreehundreddollarsontheirvacation.B、Theydrewmoneythantheyshouldhavefromthebank.C、Theylosttheirb
TOFOREIGNERS,fewthingsseemaspeculiarlyBritishasthehabitofsendingyoungchildrenawayfromhometoschool.Atfirstg
A、Someonespilledwateronit.B、Someonelostit.C、Itwasmadeoflowqualitymetal.D、Thestandardformeasuringhadchanged.
DrMargaretChanofChinawillbethenextDirectorGeneraloftheWorldHealthOrganization(WHO).Afterherappointment,shet
TheHistoryofCoca-ColaToday,thecompany’strademarkisworld-famousanditsproductsaverageastaggering400millionse
OnesummermywifeChrisandIwereinvitedbyfriendstorowdowntheColoradoRiverinaboat.Ourexpeditionincludedmanyhi
WithChina’srapideconomicdevelopments,environmentaldamagehasbecomeapressingissueinsociety.Itcallsforeffortsnot
Tobesuccessfulinajobinterview,youshould【B1】______certainandprofessional【B2】______.Youneedtocreateagood【B3】___
A、Security.B、Anti-corruption.C、Securityandcounter-terrorism.D、Counter-crime.C
A、Atthegym.B、Atarestaurant.C、Inthepark.D、Onthestreet.C对话中女士提到...soIwalkedintheparkforacoupleofmiles...I
随机试题
(2020年济南联考)隐性课程是指学校教育情境中以间接的、内隐的方式呈现出来的,对学生发展起着潜移默化影响的非正式课程。下列属于隐性课程的有()
薛恩所认为的“职业锚”包括
对久病精血不足所致的便秘,采用的治法是
王某,男,68岁。高血压病史20年。近日血压持续升高,今下午2时许突然剧烈头痛,呕吐,四肢抽搐,随之人事不醒。舌红苔黄,脉弦有力。查体:血压240/120mmHg。中医治宜
X射线断层检查仪
人民警察的素质,是指人民警察依法履行职务,完成各项任务的实际本领,是公安专业知识和专业技能的综合体现。()
“准”,就是要注意策略,讲究工作方法,不打无准备之仗,不打无把握之仗。要打得适时、有力,同时注意时间、地点、对象、节奏及宣传方法。( )
决策支持系统的基本组成部分包括()。
团购是当前一种较为流行的电子商务模式,某团购网站通过自己强大的公关能力与企业合作,向用户提供价格较为低廉或折扣较高的产品,同时,为方便用户使用,该团购网站也提供了用户之间的转让平台。根据上述描述,该团购网站涉及的电子商务类型是(8)。
Whatarethetwospeakersdoing?
最新回复
(
0
)