首页
登录
职称英语
[originaltext] If the population of the Earth goes on increasing at its pres
[originaltext] If the population of the Earth goes on increasing at its pres
游客
2023-09-13
54
管理
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 Cart 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 mount 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 then 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]“人类在金星生存的方法”是正确的。
转载请注明原文地址:http://tihaiku.com/zcyy/3011390.html
相关试题推荐
[originaltext]RobertEdwardswasblindedinanautomobileaccidentnineyea
[originaltext]RobertEdwardswasblindedinanautomobileaccidentnineyea
[originaltext]RobertEdwardswasblindedinanautomobileaccidentnineyea
[originaltext]M:Canyouspareamoment,dear?Iwantyoutolistentothislet
[originaltext]W:Ineedtocatchthebusanditleavesat10:50.M:Then,you’
[originaltext]W:Ineedtocatchthebusanditleavesat10:50.M:Then,you’
[originaltext]W:Ineedtocatchthebusanditleavesat10:50.M:Then,you’
[originaltext]W:Ineedtocatchthebusanditleavesat10:50.M:Then,you’
[originaltext]Yogabecomesverypopularnowadays,butitisimportantthat
[originaltext]I’mhavingproblemslivingwithColin.We’vebarelyspokento
随机试题
Hewasseen______theclassroomthismorning.A、toenterB、enteringC、haveenter
(1)Thegenderpaygapforfull-timeworkershasfallenbelow10%forthefir
A.2x+2y B.x+y C.2x-2y D.x-y
引起左室后负荷增高的主要因素是。A.肺循环高压 B.体循环高压 C.回心血量
根据《出境入境管理办法》规定,弄虚作假骗取签证的,处5000元以上2万元以下罚款
具有强大镇吐作用的药物是( )。A.苯巴比妥 B.氯丙嗪 C.哌替啶 D
曹操:刘备A.汽车:货车 B.蔬菜:食物 C.南京:北京 D.珠峰
根据中国银行业监督管理委员会文件规定,在客户经理负责贷款调查人职责的情况下,个人
场景(四) 具有房屋建筑设计丙级资质的某油田勘探开发公司欲新建专家公寓,该工程
男性,45岁,一年前开始乏力、消瘦,曾检查发现脾大,仅服过中药,未系统检查。近一
最新回复
(
0
)