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
At present, it seems impossible to visit the satellites of other stars in search of life. Our present theories of physics indica
At present, it seems impossible to visit the satellites of other stars in search of life. Our present theories of physics indica
admin
2013-05-24
92
问题
At present, it seems impossible to visit the satellites of other stars in search of life. Our present theories of physics indicate that it is impossible to move at a speed greater than that of light. Even at such a speed it would take many years to reach the nearest star that might have planets. Most of such stars are many lifetimes away.
Perhaps someday we shall invent ways of traveling or sending messages that will allow man to find other living things in the universe.
Even more interesting is the possibility that they may find us.
If the steady-state theory of the universe is correct, there must be many "solar systems" that are much older than ours.
On some of these, intelligent life may have evolved long ago. If so, these creatures might be exploring the universe today.
Serious scientific projects in recent years have been studying the risks with radio telescopes, hoping to find signals sent by such intelligent beings. It has been suggested that the puzzling quasars(类星体) might be the wakes(航迹) left by spaceships traveling faster than light.
Thus far, we have found no definite evidence of other intelligent life in the universe. Perhaps we never shall. Yet the search and the hope will remain an exciting possibility for the future.
As for the evidence of other intelligent life in the universe, the author believes that in the future _____.
选项
A、we shall give up hope and stop searching for it
B、these creatures will send us signals to confirm it
C、it is definitely impossible for us humans to find it
D、it is possible for us humans to continue to search for it
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/xkfK777K
本试题收录于:
四川省大学英语三级题库大学英语三级分类
0
四川省大学英语三级
大学英语三级
相关试题推荐
USUniversity【D1】______Exams:A.SATAcombinationofhighschoolgradesandSATscoresisbelievedtothe【D2】______offresh
Ininternationalmatches,prestigeissoimportantthattheonlythingthatmattersistoavoid______.
ThesixteenthinternationalAIDSconferenceopenedonSundayinToronto,Canada.Morethantwenty-fourthousanddelegatesfromo
Well,tocontinue,______,thereisalsoresearchthatdemonstratesthatindividualsperformworse,notbetter,ontaskswhenot
Iftwotypistscantypetwopagesintwominutes,howmanytypistswillittaketotype18pagesinsixminutes?
BackgroundtoeconomicsuccessChina’seconomicgrowthhaslasted40yearsandrepresentsthemost【D1】______ofthe21stcent
IhadneverbeentoDenmarkbefore,sowhenIsetouttocatchtheferryinearlyMay,Ilittle______that,bytheendofthetr
随机试题
引起波浪热的主要原因是()
在组织目标的层级体系中,()是一个在确保所有利益相关方对公司满意的同时,又充分考虑环保和可持续发展的全方位管理。
腺样囊性癌最常发生远处转移的脏器是
A.汞灯或氙灯B.钨灯C.氢灯D.能斯特灯E.紫外光灯
颐和园附近要建的电塔工程,在一片反对的_____中进入环保听证程序。事件到此并没有画上句号,它不仅_____着市民维护家园的决心和城市决策者的智慧,还关系到类似颐和园的众多风景名胜资源和文物的_____。依次填入划横线部分的最恰当的一组词语是(
中国古代,士的人格风骨最令人敬仰,也最让后人________。士在这方面的表现,是________的史书中最________的部分,也是人们看历史小说时最受感动的故事。虽然士眼中的人格,远没有人类现代文明中关于人的“健全的、完整的”意义,但其精神操守的价值
A.soIhadtobuypresentsfortwoB.IcouldusesomehelpC.JustletmeopenthedoorofitJack:CanIhelpyouwiththosepac
《刑法》第213条规定:“未经注册商标所有人许可,在同一种商品上使用与其注册商标相同的商标,情节严重的,处三年以下有期徒刑或者拘役,并处或者单处罚金;情节特别严重的,处三年以上七年以下有期徒刑,并处罚金。” 试说明:应如何理解本条中与他人注册商标“
结构化方法中,数据流程图是______。
At5:30inthemorningwearedeepinadarkforestonanislandinthemiddleofthePanamaCanal.We’vebeenoutwalkingforo
最新回复
(
0
)