首页
登录
职称英语
Are we at the beginning of another Age of Exploration? Perhaps even more imp
Are we at the beginning of another Age of Exploration? Perhaps even more imp
游客
2024-06-08
11
管理
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 colonies out into place. The distances that must be【C11】______ and the length of time it takes to do that can hardly be【C12】______ . There arc also dangers that we still do not really understand--from radiation, for example, or from pieces of matter 【C13】______ in space, or from contamination from 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. [br] 【C2】
选项
A、which
B、when
C、where
D、whether
答案
C
解析
语法结构辨析题 此处where引导定语从句,修饰中心词the point。
转载请注明原文地址:https://tihaiku.com/zcyy/3625722.html
相关试题推荐
[originaltext]Asmoreandmorepeoplelosetheirjobs,nowitisperhapsthe
[audioFiles]audio_eusm_j01_092(20099)[/audioFiles]A、Themancancomeanotherti
【S1】[br]【S3】other—another从上个分句中的onepiece和下个分句中的thenext可知,这是在进行三者之间的比较,anothe
[originaltext]M:Didyounoticetheyjustbuiltanothercoffeehouseacrossthe
[originaltext]M:Didyounoticetheyjustbuiltanothercoffeehouseacrossthe
[originaltext]M:Didyounoticetheyjustbuiltanothercoffeehouseacrossthe
[originaltext]OnecrossingoftheAtlanticisverymuchlikeanother;andpe
[originaltext]OnecrossingoftheAtlanticisverymuchlikeanother;andpe
Emotionalmaturitymeansknowingthatanotherpersoncannotfillupthehole
Emotionalmaturitymeansknowingthatanotherpersoncannotfillupthehole
随机试题
建设工程质量事故的分类方法有许多,可以按()来划分等。A.造成损失严重程度B
速度单位“米每秒”用计量单位符号表示,下列中错误的是()。A、米.秒-1 B
儿童艾滋病常见的机会感染病原是A.志贺菌 B.结核菌 C.金黄色葡萄球菌
A.母婴 B.消化道 C.性接触 D.飞沫 E.血液传染性非典型肺炎主要
根据《药品注册管理办法》A.Ⅱ期临床试验B.Ⅲ期临床试验C.生物等效性试验D.I
A.定量限 B.精密度 C.检测限 D.准确度 E.专属性SD或RSD表
A. B. C. D.
某企业为增值税一般纳税人,从外地购入原材料6000吨,收到增值税专用发票上注明
为了提高设备的本质安全度,在工业锅炉设计上,工程设计人员采用了两个安全阀的设计方
某段DNA的模板链的碱基顺序为5′-ACTAGCTG-3′,转录的RNA的相应碱
最新回复
(
0
)