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
2023-09-10
27
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 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、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项“金星上过热”是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3002634.html
相关试题推荐
[originaltext]Thenationalweathermapshowsahighpressureareaallalong
[originaltext]Howmanymendohousework?Recently,aEuropeancommissiontr
[originaltext]Howmanymendohousework?Recently,aEuropeancommissiontr
[originaltext]W:Hi,ProfessorHiggins.M:Hi,Julia.W:Wouldyoubeabletoh
[originaltext]M:Jessica,isthatyou?Ofalltheplacestorunintoeachother
[originaltext]M:Jessica,isthatyou?Ofalltheplacestorunintoeachother
InEuropeaselsewhere,multi-mediagroupshavebeenincreasinglysuccessful;___
[originaltext]AbrahamLincolnwasborninKentuckyonFebruary12,1809.Wh
[originaltext]AbrahamLincolnwasborninKentuckyonFebruary12,1809.Wh
[originaltext]W:Hi,Larry,areyouwaitingtoseeProfessorJamison,too?M:Y
随机试题
[originaltext]W:Hi,...Pete?M:Nicetomeetyou,Mrs.Morton.W:It’sniceto
患者,男性,25岁,无明显诱因出现发热,体温最高达39℃,口周出现疱疹。自服阿莫
王某,男,60岁,李某,女55岁,二人均早年离异,王某有一个儿子小王30岁,常年
为治疗风邪所致瘾疹常用的药是( )。A.白芷 B.紫苏 C.防风 D.桂
分散型的统计管理体制特点是( )。A.统计工作能够与主管部门的工作紧密结合
(2016年真题)财务控制的重点内容包括()。A.人员流动控制 B.作业
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
A.黄连 B.黄芩 C.黄柏 D.苦参 E.土茯苓善治梅毒湿疮的药是
混凝土预制桩施工中的沉桩方法有()等。A.水冲法 B.静力压桩法 C.锤击法
某项目招标控制价为8000万元,中标价为7600万元。合同约定工程量
最新回复
(
0
)