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
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【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] 【B8】
选项
答案
break down
解析
此处需要动词充当谓语。短语break down的意思是“分解”。
转载请注明原文地址:https://tihaiku.com/zcyy/3555108.html
相关试题推荐
[originaltext]M:IsthereaneedtocontrolpopulationonlyincountrieslikeI
[originaltext]M:IsthereaneedtocontrolpopulationonlyincountrieslikeI
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,there
[originaltext]Untilthe20thcentury,mostpaintingswererepresentational.
[originaltext]Untilthe20thcentury,mostpaintingswererepresentational.
[originaltext]Untilthe20thcentury,mostpaintingswererepresentational.
随机试题
[originaltext]Goodeveningandwelcometotonight’slecture.Mytopictoday
[originaltext]Manychildrenfirstlearnthevalueofmoneybyreceivingana
Everyonewouldhaveheardthefamousphrase"Angerisoneshortofdanger".
社会主义道德建设之所以要以集体主义为原则,主要是因为()。A.以中国特色社会主
某企业上年度资金平均占用额为3000万元,经分析,其中不合理部分500万元,预计
以下有关酸碱平衡的说法,错误的是A.血液pH>7.45为失代偿性碱中毒 B.仅
( )是指某个特定的个别银行产品,它是金融产品划分的最小单位。A.产品线 B
J97、停电拉闸操作必须按照()的顺序依次进行,送电合闸操作应按与上述相反的顺
对老年人经济上供养、生活上照料和精神上慰藉的义务,属于老年人享有的()。A.
“三个代表”重要思想与邓小平理论的关系是 A.坚持与继承 B.创新与发展
最新回复
(
0
)