首页
登录
职称英语
If the population of the Earth gees on increasing at its present rate, there
If the population of the Earth gees on increasing at its present rate, there
游客
2024-04-15
37
管理
问题
If the population of the Earth gees 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] 【B4】
选项
答案
exhausted
解析
根据空格前的系动词are,推断此处用过去分词表被动。注意exhaust“耗尽”不要漏掉字母h。
转载请注明原文地址:https://tihaiku.com/zcyy/3556728.html
相关试题推荐
IfthepopulationoftheEarthgeesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgeesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgeesonincreasingatitspresentrate,there
IfthepopulationoftheEarthgeesonincreasingatitspresentrate,there
Karaokemayneverbethesame,thankstoresearchbeingpresentedinNashvil
Karaokemayneverbethesame,thankstoresearchbeingpresentedinNashvil
Karaokemayneverbethesame,thankstoresearchbeingpresentedinNashvil
Karaokemayneverbethesame,thankstoresearchbeingpresentedinNashvil
Karaokemayneverbethesame,thankstoresearchbeingpresentedinNashvil
InJanuary1989,theCommunityofEuropeanRailwayspresentedtheirproposal
随机试题
Waiter:Wouldyouliketohaveonebillorseparatebills,sir?John:It’smyt
[originaltext]Nowwe’vebeentalkingabouttherevolutionaryperiodintheUnit
【B1】[br]【B7】[audioFiles]audio_eufm_j02_007(20082)[/audioFiles]Little
A.肺野内有广泛斑点状阴影,叶间积液 B.肺门阴影深,肺纹理增粗,肺野斑点状阴
根据《标准施工招标文件》中的通用合同条款,对承包人提出的索赔,监理人应在收到上述
根据财政政策具有调节经济周期的作用来划分,可分为自动稳定的财政政策和()的财政
皮肤出现红色皮疹,抚之碍手,压之褪色,可见于( )。A.热气疮 B.疔疮
“教育万能论”的提出者是( )A.卢梭 B.爱尔维修 C.涂尔干 D.培
引气混凝土的胶凝材料用量与非引气混凝土要求()A.不同 B.相同 C.
抽样调查得某地200名正常成人的发汞值,资料如下表所示:欲比较该山区健康成年男性
最新回复
(
0
)