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
2024-06-04
36
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、We will not have enough food to eat.
B、All the oil that drives our cars will be used up.
C、The earth will become too crowded.
D、There will be little water left on Earth.
答案
D
解析
该题问“下列那句文中没有提到?”文中提到“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.”根据原文的信息,我们可以判断,排除A项,D项,C项因此,D项“地球上将不剩多少水”正是没提到的。
转载请注明原文地址:https://tihaiku.com/zcyy/3618899.html
相关试题推荐
[originaltext]Formanyinternationalstudents,comingtotheUnitedStates
[originaltext]Formanyinternationalstudents,comingtotheUnitedStates
[originaltext]Formanyinternationalstudents,comingtotheUnitedStates
[originaltext]M:Therearejustoneortwomorethings,Catherine.W:Docallm
[originaltext]Whydowecry?Canyouimaginelifewithouttears?Noton
[originaltext]Hiddenpassengerstravelinginships,trains,orevencarsca
[originaltext]Hiddenpassengerstravelinginships,trains,orevencarsca
[originaltext]Hiddenpassengerstravelinginships,trains,orevencarsca
[originaltext]ThesilenceoftheReferenceLibrarywasbrokenonlybyanoc
[originaltext]W:Goodmorning.CanIhelpyou?M:Yesplease.Iwouldliketoh
随机试题
ItisnothingnewthatEnglishuseisontherisearoundtheworld,especiall
ThegapbetweenthosewhohaveaccesstocomputersandtheInternetandthose
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
甲工厂原有东门可以出入,后想开西门,借用乙工厂的道路通行。甲工厂与乙工厂约定,甲
下列描述中,属于DoS攻击的()。A.为Wi-Fi设置连接口令,拒绝用
下列关于导爆索起爆的规定正确的是()。A、导爆索只准用快刀切割,不得用剪刀剪断
关于宫内节育器的并发症,说法不正确的是A:子宫内膜炎 B:输卵管炎 C:节育
两组蓄电池组的直流系统,应满足在运行中二段母线切换时不中断供电的要 求,切换
甲、乙两个工程队共同参与一项建设工程。原计划由甲队单独施工30天完成该项工程三分
18岁男性患者,双下肢水肿伴尿少4周,查Bp135/90mmHg,尿蛋白(+++
最新回复
(
0
)