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
59
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.
【C10】
选项
A、after
B、till
C、before
D、until
答案
C
解析
上下文语义。根据句意为:Great problems当然应该在我们送colonists上太空以前解决,所以应选before。故答案为C。
转载请注明原文地址:https://kaotiyun.com/show/blhO777K
0
考博英语
相关试题推荐
Everysociety,beginningwithsomeslightinclinationinonedirectionoranother,carriesitspreferencefartherandfarther,i
Everysociety,beginningwithsomeslightinclinationinonedirectionoranother,carriesitspreferencefartherandfarther,i
ByaboutA.D.500theMoundBuilderculturewasdeclining,perhapsbecauseofattacksfromothertribesorperhapsbecauseofs
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensivebreathemanatesfrombacteriainthemouth,althou
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensivebreathemanatesfrombacteriainthemouth,althou
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensivebreathemanatesfrombacteriainthemouth,althou
Anothertrendofthe1990sinthecomputerindustryistowardmultimediaformats,asthemarketforconventionaltypesofcomput
Anothertrendofthe1990sinthecomputerindustryistowardmultimediaformats,asthemarketforconventionaltypesofcomput
随机试题
宏昌咨询公司在对公司战略及其发展途径、SWOT分析、战略失效等进行调查研究,分别选取了国内和国外的公司,相关信息如资料一、资料二和资料三所示。材料一巨丰公司是国内一家大型家用汽车生产企业,公司在历史上先后采取了若干影响巨大的决策,为企业
A.消食和胃,行气消痞B.养阴益胃,调中消痞C.温中健脾,和胃降逆D.补气健脾,升清降浊E.健脾益气,和胃降逆
1岁患儿,以发热2天伴频繁抽搐、吐奶入院。体检:T39℃,咽红,扁桃体1度肿大,前囟饱满。白细胞15.6×109/L,尿常规(一)。
下列属于节律异常的脉搏是()。
建设项目竣工环境保护验收时,对于评价监测结果,大气综合排放标准的值是按污染物的()来评价的。
下列关于基金份额持有人的说法,正确的有()。
(2013年)2011年9月8日,甲公司与乙公司订立合同,以每台30万元的价格购买20台货车。双方约定,甲公司应在乙公司交货后半年内付清全部货款,并以甲公司通过划拨方式取得的某国有建设用地使用权提供抵押担保。双方办理了抵押登记。2011年10月1
质量改进中“掌握现状”要调查的内容有()。
简述行政执行的原则。
监护人应当承担的职责包括()。
最新回复
(
0
)