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
11
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
光纤接入网的长远目标是FTTB
实验室保存技术记录的主要原因是()A.建立核查线索以利追击 B.当害户抱
A.心与肾B.肝与肾C.脾与肾D.肝与脾E.肺与肾统藏失司责之的脏腑病变
项目进度控制总目标可按单位工程分解为()分目标。 A、交工 B、竣工
交叉口交通组织方式中,( )适用于快速、有连续交通要求的大交通量交叉口。A.无
企业年金属于( )。A.非工作日福利 B.法定保险福利 C.员工补充保险福
我国中小学课程(教学)计划的最基本部分是( )A.课程设置 B.课时分配
某女,33岁。刷牙经常出血,临床诊断为牙龈炎,应建议她多长时间做一次洁治?(
适用于时标网络图的是()A.横道图 B.S形曲线 C.香蕉图 D.前
细胞坏死的主要形态学特征是 A.核分裂 B.细胞核异型 C.线粒体肿胀
最新回复
(
0
)