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
34
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
Withtherecentscandalinmind,wouldyouadvisepeoplewhohave______intheirclosetstoclearouttheirclosets?
Ourhistoryincludesmanygreatscientists.Theyincreasedourknowledgebut【M1】______changedourideasabouttheworldando
Despitethechokingsmog,Beijingisstillthenumberonechoiceforgraduatejobseekersbasedonits"softenvironment",acco
DINKisan______forcoupleswithdualincomeandnochildrenandthusDINKsalwayshavemoredisposableincomethantheaverage
ThesixteenthinternationalAIDSconferenceopenedonSundayinToronto,Canada.Morethantwenty-fourthousanddelegatesfromo
Iftwotypistscantypetwopagesintwominutes,howmanytypistswillittaketotype18pagesinsixminutes?
A、IthelpedAnita’scompanytoexpanditsbusinessabroad.B、Anita’scompanysufferedagreatloss.C、Anita’scompanyearnedal
OurplannedvisittotheUnitedKingdom______becausewewereunabletogetthevisasbeforethedateofdeparture.
—Dothetwobrotherskeepintouch?Iremembertheyusedtobeveryclose.—Yes,theydo—butnotasmuchasbeforetheyweremar
随机试题
某厂发生了火灾事故,可能与下列()无关。
关于硝酸甘油,哪种论述是错误的:
患者张某,男性,28岁。农民,患者发热恶寒,咳嗽,咳白黏痰,痰量由少渐多,胸痛剧烈,呼吸不利,苔薄黄,脉浮滑数。其治疗应首选的方剂是
对到门诊就诊的患者首先应采取的措施是
甲为杀害乙,在晚上将乙家的房子点燃,乙和乙的妻子、孩子被烧死,乙家的房子也被烧毁。对甲的罪数分析,下列哪一选项是正确的?()
银行间债券市场的交易制度不包括()。
甲手机专卖店为增值税一般纳税人,2015年10月采取以旧换新方式销售某型号手机100部,该型号新手机的同期含税销售单价为3276元,旧手机的收购单价为234元,已知增值税税率为17%,甲手机专卖店当月该业务增值税销项税额的下列计算列式中,正确的是(
如图所示电路中,9V电压源发出的功率是()。
注册商标专用权的有效期限是()。
TheLureofaBigCityVacation[FromtheTowerofLondontoParis’EiffelTower,historiclandmarksandone-of-a-kindattrac
最新回复
(
0
)