首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
财经
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sus
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sus
admin
2015-03-08
15
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. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
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 organisms, which 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 then 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.
Carl Sagan believes that Venus might be colonized from earth because______.
选项
A、it might be possible to change its atmosphere
B、its atmosphere is the same as the earth’s
C、there is a good supply of water on Venus
D、the days on Venus are long enough
答案
A
解析
此题考查因果关系。由第二段第一句中的“it will be possible to change the atmosphere ofVenus and so create a new world”可知,so是表示因果的连接词,前因后果。所以正确答案是A。
转载请注明原文地址:https://kaotiyun.com/show/Jjgc777K
本试题收录于:
英语题库银行系统招聘考试分类
0
英语
银行系统招聘考试
相关试题推荐
Scienceisadominantthemeinourculture.Sinceittouchesalmosteverytacetofourlife.educatedpeopleneedatleastsomeac
Ihadanexperiencesomeyearsagowhichtaughtmesomethingaboutthewaysinwhichpeoplemakeabadsituationworsebyblaming
Thisbookisforpeople______eyescanntsee.
Shoppinghasalwaysbeensomethingofanimpulseactivity,inwhichobjectsthatcatchourfancvwhilestroilingareimmediately
From:RestaurantManagementTo:AllStaffAttentionworkers:Ally’sSeafoodHousewillbeclosedforanentireweekat
Risingwages—togetherwithcurrencyfluctuationsandhighfuelcosts—areeatingawaytheonce-formidable"Chinaprice"advan
Risingwages—togetherwithcurrencyfluctuationsandhighfuelcosts—areeatingawaytheonce-formidable"Chinaprice"advan
Someofourclientshavecomplainedthatthetimeittakestogetafromaservicerepresentativeisenoughtomakethemnotwan
Takemoremoney.Theticketsare______tobeexpensive.
随机试题
当事人有下列情形的,不应当减轻行政处罚:()。
一般认为羊水指数大于18cm为羊水过多。
护理人力资源管理的发展趁势最基本的是要求管理人员做到()
人体内调节血钙和钙离子水平的主要器官是
有以下情形之一的,经批准可以减征个人所得税()。
ThecapitalcityofCanadais______.
下列选项中,属于对人民警察的处分的有()。
当理由是一般侵权民事责任的抗辩事由之一,包括()。
简述学习迁移的形式训练说及其对教育的影响。
以下属于成年期的发展任务有()。
最新回复
(
0
)