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
101
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.
In the long run, the most difficult problem caused by population growth on earth will probably be the lack of______.
选项
A、food
B、oil
C、space
D、resources
答案
C
解析
由第一段可知,如果人口按照目前速度持续膨胀的话,地球上最终会缺乏资源来维持这么多的生命。即使科学家发明出替代资源,拥挤的人口也使我们不得不到其他星球寻找生存空间。但是目前太阳系还没有发现能维持生命的行星。因此和缺乏资源相比,缺乏生存空间才是最令人担忧、最难解决的问题。所以正确答案为C。
转载请注明原文地址:https://kaotiyun.com/show/TDgc777K
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
My(A)mostfavoritesport(B)isbasketball,andI’m(C)a(D)memberofourbasketballteam.
Takethecaseofpubliceducationalone.Theprincipaldifficultyfacedbytheschoolshasbeenthetremendousincreaseinthenum
Pleasepronouncetheword_____Idid
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoactm
GlenfordManufacturing,Inc.OfficialCommunicationFrom:SeanCarmichael,OperationsDepartmentTo:InnaTucker,SalesDepart
From:ThyNguyenTo:CyprusWinnSubject:FinalreviewfortheproposalDearCyprus,I’vecompletedourfundingproposal
JULIE’SSNACKBARTheBestNewRestaurantTown!!1145WhittakerRoadDe
Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemsthatfouroutoffiveyoungpeoplenowgetonwithth
TheleadersofDetroit’sstrugglingBigThreeautomakersareappearingbeforetheSenatetoday,whereprospectsof¥25billioni
ItisestimatedthatinTokyo70%ofsingleworkingwomenchoosetolivewiththeirparentsandonly50%ofthempaysomerent.Aft
随机试题
向代表机构或分支机构、业务代办人送达的方式包括的两种情况是
患者:“我每天都要喝一点酒。”护士:“请问你每天具体喝多少?”护士使用的沟通技巧是()
鹏远有限责任公司是一家中外合资经营企业,2008年度发生了以下事项:(1)1月21日,公司接到市财政局通知,市财政局将要来公司检查会计工作情况。公司董事长兼总经理胡某认为,公司作为中外合资经营企业,不应受《中华人民共和国会计法》的约束,财政部门无
分散型的统计管理体制特点是()。
()是指在一定生产技术组织条件下,采用科学合理的方法,对生产单位合格产品或完成一定工作任务的活劳动消耗量所预先规定的限额。
“一带一路”是中国政府现在正在推动的重要战略,所谓“一路”是指建设21世纪海上丝绸之路,中国将进入海洋、拥抱海洋,多方向增进中国与沿线国家的联系;所谓“一带”,是指丝绸之路经济带,中国将通过陆上丝绸之路进入中亚、东南亚、俄罗斯、中东欧和西欧。“一带一路”将
目前,我国虽然与许多发达国家签有双边贸易协定,但是中国的出口仍然成为各种歧视贸易措施的目标,仍然面对着各种歧视性数量限制、选择性保障措施,以及建立在歧视性标准基础上的反倾销和反补贴措施。这段话主要说明了:
A、抱怨B、安慰C、讽刺D、赞叹C“等了半个小时”,不是“来得早”,所以说话人是在讽刺对方。
Readthefollowingarticlefromanewspaperandanswerquestions19-25.Forquestions19-25,choosethecorrectanswerA,B,
CollegeLifeWhenstudentsleaveforcollegeatanage17or18,/manyofthemhaveneverbeenawayfromhomeandtheirfam
最新回复
(
0
)