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
外语
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to kee
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to kee
admin
2018-09-25
39
问题
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to keep our lives 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. 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 American scientist, Professor Carl Sagan.
Sagan believes that before the earth’s resources are completely used up 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(藻类)organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in condition similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceship 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 ban 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 man 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 agood supply of water on Venus
D、the days on Venus are long enough
答案
A
解析
此题问的是Carl Sagan认为金星会被征服的原因,属于细节事实题。我们在文章第二段的第一句话“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”(Sagan认为在地球资源完全用尽之前有可能改变金星上的大气,和建造一个与地球差不多大的新世界)中可以找到答案,即原因是“可以改变金星上的大气环境”,正确答案为A。B,C,D三个选项里面所说到的内容均与此段后文所说的内容不相符。
转载请注明原文地址:https://kaotiyun.com/show/VU3O777K
0
成人本科学位英语
相关试题推荐
Don’torganizethechildren’splayallthetime.______themtotheirownresources.
Tom’sfather,aswellashismother,______inNewYorkforafewdaysmore.
InnocountryotherthanBritain,ithasbeensaid,______experiencefourseasonsinthecourseofasingleday.
Notoncesincemysonwenttohighschool______travelingwithhim.
______hehaslimitedtechnicalknowledge,theoldworkerhasalotofexperience.
—I’dliketotakeachanceandrunabusiness.—Doyouknowaboutthelocalmarket?______
Newspapersarenotnearlyaspopulartodayastheywereinthepast.Therearenotverymanypeoplewhoseriouslyreadanewspap
Theyarebuildingthedamin______withanotherfirm.
Forreasonsofsafetyandeaseofmaintenance,Washingtonanddozensofothercommunitiesarebuildingrubbersidewalksmade【C1】
AsHurricaneHugoapproachedtheAtlanticcoast,itincreaseddramaticallyinstrength,becomingthetenthmostintensehurrican
随机试题
正弦交流电网电压值,如380V、220V,此值指的是()。
下列关于建筑工程一切险的相关规定不正确的是( )。
某堤防工程项目业主与承包商签订了工程施工承包合同。合同中估算工程量为5300m3,单价为180元/m3。合同工期为6个月。有关付款条款如下:(1)开工前业主应向承包商支付估算合同总价20%的工程预付款;(2)业主自第一个月起,从承包商的
客户的风险偏好信息属于客户的判断性信息。一般来说,客户的风险偏好可以分为()等几种类型。
根据公司公开的财务报表计算披露的经济增加值时,需纳人调整的事项有()。
甲公司持有乙公司20%有表决权股份,采用权益法核算。2011年12月20日,甲公司将一批账面价值为1000万元的商品,以600万元的价格出售给乙公司(假设交易损失中有300万元是减值造成的)。至2011年资产负债表日,该批商品对外部第三方出售40%。假定甲
如果企业清偿因或有事项而确认的负债所需支出全部或部分预期由第三方补偿,下列表述中正确的有()。
铜川是华夏文明的发源地之一,在这块历史悠久而又灵性充溢的土地上,诞生了被古今尊称为“药王”的唐代伟大医药家(),大书法家()和北宋著名山水画家()等一批名人。
居民委员会或村民委员会是我国最低一级国家政权。()
WhiletheripplesofAmerica’ssubprime-mortgagecrisishavespreadfarandwide,LatinAmerica—aplacelongassociatedwithfin
最新回复
(
0
)