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
2015-01-08
48
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,所以正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/UDgc777K
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
Ithinkit’Sthedriverratherthanthepassengerswho__________fortheaccident.
Racket,dinclamor,noise.Whateveryouwanttocallit,unwantedsoundisAmerica,smostwidespreadnuisance.Butnoiseismoreth
Managersinthebusinessworldhavebeentaughttothinkintermsofcontrol.Thegoodmanagerisonewhooverseeseveryaspect
JULIE’SSNACKBARTheBestNewRestaurantTown!!1145WhittakerRoadDe
Whenfirstentered,VanakRestaurantdoesnotlooklikemuchofarestaurant,butoncethepleasantsmellsofkabob(烤肉串)hitthe
Noneofusexpectedthechairmanto______attheparty.Wethoughthewasstillinhospital.
"Mostepisodesofabsent-mindedness------forgettingwhereyouleftsomethingorwonderingwhyyoujustenteredaroom------arec
Sixteenyearsago,EileenDoyle’shusband,anengineer,tookhisfourchildrenupforanearlymorningcupoftea,packedasmal
Ihaveboughtthesamedress______sheiswearing.
Much_________Ihavetraveled,Ihaveneverseenanyonetoequalherinefficiency.
随机试题
休克代偿期的临床表现是()
下列选项中不符合湿性坏疽的描述是
关于心身疾病,下列提法中错误的是
工程风险的实质是由于()的存在,引发风险事故,最终导致损失。
工程项目建成后,不可能像某些工业产品那样,可以拆卸或解体来检查内在的质量,所以工程质量应重视( )的控制。
建设工程项目施工质量计划按其内容可分为()计划。
一般来说,趋势线的作用就是保证原有的趋势,起支撑和压力的作用。( )
美国著名企业家玛丽,凯在《用人之道》一书中这样说:“决不可只批评不表扬。这是我严格遵循的一个原则。你无论批评什么表现或者批评哪个下属。也得找点值得表扬的事情留在批评后。这叫‘先批评,再表扬’。”你若作为某一部门的领导。对此有何感想?
随机地向半圆0<y<(a>0)内掷一点,点落在半圆内任何区域的概率与区域的面积成正比,则原点与该点的连线与x轴夹角小于的概率为__________.
(1)在名称为Form1的窗体上画1个名称为Framel、标题为“学位”的框架;框架内有1个名称为Optionl的控件数组,该控件数组含有4个标题分别为“学士”、“硕士”、“博士”和“其他”的单选按钮,它们的Index属性分别为0、1、2、3,且标题为“硕
最新回复
(
0
)