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
2024-06-10
4
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、Venus is too hot.
B、There is no water there.
C、There is no oil.
D、It is lacking in carbon dioxide.
答案
A
解析
该题问“根据卡尔教授的说法,金星的大气存在什么问题?”文中提到"The difficulty is that Venus is much hotter than the Earth and there is only a tiny amount of water there."。因此,[A]“金星上过热”是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3627658.html
相关试题推荐
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencear
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencear
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]Asaresultofrisinguniversitycosts,manystudentsarefind
[originaltext]Asaresultofrisinguniversitycosts,manystudentsarefind
[originaltext]Alaskaisknownforitscoldsnowyweather.Formanyyears,do
[originaltext]W:IheardyoujustgotbackfromaweekendtriptoSantaFe.Ih
[originaltext]W:IheardyoujustgotbackfromaweekendtriptoSantaFe.Ih
[originaltext]W:IheardyoujustgotbackfromaweekendtriptoSantaFe.Ih
随机试题
Whycan’tthefamilystayatthehotelonthefollowingweekend?[br][original
Hewasdeterminedtosailaroundtheworld______hisillnessandoldage.A、give
网络的逻辑组成包括资源子网和通信子网,资源子网负责全网的数据传输、转发和通信处理
预防接种的目的()A.提高人群易感性 B.降低人群敏感性 C.提高人群免疫水
工程设计质量管理的依据,不属于项目批准文件的是( )。 A、项目可行性研究报
(2013年)根据保密法,确定测绘活动中生产的涉密测绘成果或其衍生产品的密级、保
Thechangeinthatvillagewasmiraculou
根据所给图表资料回答问题 2010年3―12月中汽车单月产量超过1
(2015年真题)下列情形中,投标人中标有效的是( )。A.投标人给予招标人金
关于投标人的说法,正确的有()。A.投标人参加依法必须进行招标的项目投标,不受
最新回复
(
0
)