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
49
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/3002633.html
相关试题推荐
[originaltext]ThecolorfulInternetdrawsustocomputersandbringsusjoy
[originaltext]ThecolorfulInternetdrawsustocomputersandbringsusjoy
[originaltext]W:Hello,John,youmustbepleased.Afterall,howmanystudents
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]Themodernsailingshipwasdevelopedbyamanwhoneverwent
随机试题
WhatkindofplaceisFamilySecuritySystems?[originaltext]Youhavereachedth
Ourlivesarewoventogether.AsmuchasIenjoymyown【C1】______Inolonger
Peoplestudytheirfamilyhistoryfordifferentreasons.Forsome,genealogy
在断路器的动作时限选择中应考虑故障点的电弧熄灭并使周围介质恢复绝缘强度的时间
下列哪项不是血浆蛋白的生理功能A. B.缓冲功能 C.参与生理止血 D.参
某患者静脉注射(推注)某药,已知剂量X0=500mg,V=10L,k=O.lh-
教学实践中评价的激励功能可采用哪些方法达成() A.将课程分成小单元,即时激
根据《国家电网公司变电运维管理规定》,端子箱及电源箱每季度进行一次熔断器、空气开
关于通信工程项目的说法,正确的有()。A.通信工程项目通常按投资类项目进行管理
呼吸频率加倍,潮气量减半时,将使()。 A.每分通气量增加 B.每分通气量减
最新回复
(
0
)