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
4
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
功能清热燥湿,又善清肺热的中药是A.黄芩B.黄连C.黄柏D.苦参E.龙胆
患儿,6岁。急性肾炎。今晨突然出现呼吸困难,不能平卧,咳嗽,咳粉红色泡沫痰,尿量
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
下面关于大气污染物危害的描述错误是()。 A大气污染物侵入人体主要有三条途
在下列传统节日中,有吃粽子、赛龙舟习俗的是( )。A.清明节 B.重阳节
2013年上半年与上年同期相比,下面四个税种中增速最快的税种是:() A.
以下关于中国银保监会监督管理职责和措施的表述,错误的有( )。A.银保监会可以
关于正当防卫与紧急避险,下列哪一选项是正确的?A、为保护国家利益实施的防卫行为,
(2020年真题)小林为中国公民,7月他共取得以下收入: (1)取得房屋出租收
女,21岁。1型糖尿病8年,平素4次(R-R-R-N)胰岛素皮下注射治疗,定期查
最新回复
(
0
)