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
Are we at the beginning of another Age of Exploration? Perhaps even more important, are we at the beginning of【C1】______Age of C
Are we at the beginning of another Age of Exploration? Perhaps even more important, are we at the beginning of【C1】______Age of C
admin
2014-01-13
52
问题
Are we at the beginning of another Age of Exploration? Perhaps even more important, are we at the beginning of【C1】______Age of Colonization? As the population of the world increases towards the point【C2】______the earth can no longer support all the people【C3】______on it, the second question becomes urgent. Will we discover a new world, 【C4】______Columbus did, on which human life will be possible? At this point in the space age, no one can really answer these questions. We can say, 【C5】______that we will not see tomorrow the kind of space travel that【C6】______fiction and the movies have shown. It will be a long time before we have flight that run【C7】______to human colonies on the moon or on, one of the planets. We are not even going to be able to【C8】______immediate advantages of the minerals that we may find on the planets【C9】______our own solar system.
Great problems must be solved【C10】______we could send colonists out into place. The distances that must be【C11】______and the length of time it takes to do that can hardly be【C12】______There are also dangers that we still do not realty understand, from radiation, for example, or from pieces of matter【C13】______in space, or from contamination forms of life that might【C14】______there. There is also need for humans to take their own environment into space【C15】______them. So far no "island" has been discovered in space on which people can exist without systems that【C16】______life, and these systems must accompany any future space【C17】______Finally, on the most practical【C18】______there has to be enormous expense【C19】______in space exploration. The U. S. and Russian governments have already spent billions of dollars for projects【C20】______which they can receive a return only in knowledge and not in money.
【C5】
选项
A、however
B、moreover
C、otherwise
D、therefore
答案
A
解析
逻辑关系。上句提到no one can really answer these questions(没有人能回答这些问题),本句又说We can say(我们可以说),明显存在转折的关系。选项中,只有however(然而)表转折。故答案为A。
转载请注明原文地址:https://kaotiyun.com/show/9lhO777K
0
考博英语
相关试题推荐
Everysociety,beginningwithsomeslightinclinationinonedirectionoranother,carriesitspreferencefartherandfarther,i
Everysociety,beginningwithsomeslightinclinationinonedirectionoranother,carriesitspreferencefartherandfarther,i
Everysociety,beginningwithsomeslightinclinationinonedirectionoranother,carriesitspreferencefartherandfarther,i
ByaboutA.D.500theMoundBuilderculturewasdeclining,perhapsbecauseofattacksfromothertribesorperhapsbecauseofs
Perhapstheonly______thatphysicistshaveare,forbigscience,theculturalappealtothepublicoffundamentallawsofnatu
DukeEllington’s______orchestrationtechniquesmadehimperhapsthemostremarkableartistthatjazzhasproduced.
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensivebreathemanatesfrombacteriainthemouth,althou
随机试题
微内核所提供的服务不包括()
下列条件最适合于病毒长期保存的是
下列药物的不良事件中可以引起肾损害和肾衰竭的有()。
关于脑血栓形成不正确的是
以未经审核的会计凭证为依据登记账簿是()。
打开Word后,系统默认显示的工具栏包括()。
确定培训项目收费标准的方法主要有()。
“三武灭佛”中的“三武”不包括()。
依恋
洛克是要素教育的代表,著作是《教育漫话》。()
最新回复
(
0
)