首页
登录
职称英语
If the population of the Earth goes on increasing at its present rate, there
If the population of the Earth goes on increasing at its present rate, there
游客
2024-04-14
25
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【B1】______ life on the planet. By the middle of the 21st century, if present【B2】______ 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 【B3】______ 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【B4】______, 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【B5】______ that algae(藻类), organism that can live in 【B6】______ hot or cold atmospheres and at the same time produce oxygen, should be【B7】______ in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will【B8】______ 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【B9】______ of the planet will still be too hot for men to【B10】______ it but the rain will eventually fall and in a few years something like Earth will be reproduced on Venus. [br] 【B2】
选项
答案
trends
解析
短文谈论的是人口增长的状况,trend的意思是“趋势”,即人口增长的这种趋势。
转载请注明原文地址:https://tihaiku.com/zcyy/3555102.html
相关试题推荐
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
Inrecentyears,wehaveallwatchedtheincreasingcommercializationofthe
[originaltext]Theadvantagesanddisadvantagesofalargepopulationhavel
U.S.collegestudentsareincreasinglyburdenedwithcreditcarddebt,accor
随机试题
WhenGeorgeW.BushdeliveredhisStateoftheUnionAddressthispastJanuar
FallingThroughtheCracks(被忽视)DanielSpangenburger,a
Inmanywayswecanallbeencouragedtolearnanotherlanguage.Althoughit
Americanwomenwilloccasionallywearshortskirts,sleevelessshirts,makeu
"Avoidtherush-hour"mustbethesloganoflargecitiestheworldover,whe
我国高程系统采用正常高系统,地面点的正常高的起算面是()A:似大地水准面B:大
检查线的方向应尽量与主测深线垂直,分布均匀,并要求布设在较平坦处,能普遍检查主测
89.电抗器的作用是抑制高次谐波,降低母线残压。
证券交易中的委托单,如经客户和证券经纪商双方签字和盖章,性质上就相当于()。A:
货币市场工具与资本市场工具的主要区别在于()。A.成本不同 B.期限不同
最新回复
(
0
)