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
22
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://jikaoti.com/ti/MzFMFFFM
0
大学英语六级
相关试题推荐
Let’sproceedtothemainexhibithallandlookatsomeoftheactualvehiclesthathaveplayedaprominentroleinspeedingup
Whydoesoneperson’smouthwateratthemerementionofoysters.【C1】______someoneelse’scurlsindisgust?Puzzling【C2】______
TOFOREIGNERS,fewthingsseemaspeculiarlyBritishasthehabitofsendingyoungchildrenawayfromhometoschool.Atfirstg
TheHistoryofCoca-ColaToday,thecompany’strademarkisworld-famousanditsproductsaverageastaggering400millionse
"ItisdifficultnottohearinStandardEnglishalwaysthesoundofslaughterandconquest"(Hooks,1994).Leaningonelang
"ItisdifficultnottohearinStandardEnglishalwaysthesoundofslaughterandconquest"(Hooks,1994).Leaningonelang
A、Sheisnotinterestedinthecourse.B、Shehastroublefollowingtheprofessor’slecture.C、Shefindsitdifficulttofinisht
Itisanage-old【B1】______:MenarefromMars;WomenarefromVenus.Malesandfemalesshowdifferentbehaviorsalmostfrom【B2】
A、Venusistoohot.B、Thereisnowaterthere.C、Thereisnooil.D、Itislackingincarbondioxide.A该题问“根据卡尔教授的说法,金星的大气存在什么问题?
A、Soil.B、Humanpopulation.C、Forest.D、Water.B细节考察题。从文章中看出有土壤,森林,水资源,动植物等方面,而没提及对人口造成的影响。
随机试题
35Mn代号的含义:优质碳素钢,碳的质量分数为0.35%,而且是含锰量较高的优质钢。
注册不当的商标被撤销后,因商标注册人的恶意给他人造成损失的()
支气管肺隔离症的供血来自:
病人的诊断是立即给病人快速补充血容量,宜首选
下列各项费用中,不能直接计入“生产成本一基本生产成本”科目的是()。
甲对乙享有50000元债权,已到清偿期限,但乙一直宣称其无力清偿欠款;甲调查后发现下列情况,乙均怠于行使债权,其中,甲可以代位行使债权的有()。
领导和单位里一个比较老的同事因为对你起草的一份文件有不同意见产生分歧而争吵起来。你怎么办?
市场细分就是营销者通过市场调研、依据消费者(包括生活消费者、生产消费者)的需要与欲望、购买行为和购买习惯等方面的明显的差异性,把某一产品的市场整体划分为若干消费者群(买主群)的市场分类过程。根据定义,不属于市场细分的是()
下面关于PATH命令的说法中,正确的一条是( )
Thekillerarrestedbythepolicehasalreadyclaimedfourlives,andeventhedetectivesare________.
最新回复
(
0
)