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
When imaginative men turn their eyes towards space and wonder whether life exists in any part of it, they may cheer themselves b
When imaginative men turn their eyes towards space and wonder whether life exists in any part of it, they may cheer themselves b
admin
2013-05-29
56
问题
When imaginative men turn their eyes towards space and wonder whether life exists in any part of it, they may cheer themselves by remembering that life need not resemble closely the life that exists on Earth. Mars looks like the only planet where life like ours could exist, and even this is doubtful. But there may be other kinds of life based on other chemistry, and they may multiply on Venus or Jupiter. At least we cannot prove at present that they do not.
Even more interesting is the possibility that life on their planets may be in a more advanced stage of evolution. Present-day man is in a peculiar and probably temporary stage. His individual units retain a strong sense of personality. They are, in fact, still capable under favorable circumstances of leading individual lives. But man’s societies are already sufficiently developed to have enormously more power and effectiveness than the individuals have.
It is not likely that this transitional situation will continue very long on the evolutionary time scale. Fifty thousand years from now man’s societies may have become so close-knit that the individuals retain no sense of separate personality. Then little distinction will remain between the organic parts of the multiple organisms and the inorganic parts (machines) that have been constructed by it. A million years further on man and his machines may have merged as closely as the muscles of the human body and the nerve cells that set them in motion.
The explorers of space should be prepared for some such situation. If they arrive on a foreign planet that has reached an advanced stage (and this is by no means impossible), they may find it being inhabited by a single large organism composed of many closely cooperating units.
The units may be "secondary"—machines created millions of years ago by a previous form of life and given the will and ability to survive and reproduce. They may be built entirely of metals and other durable materials. If this is the case, they may be much more tolerant of their environment, multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar carbon cycle.
Such creatures might be relics of a past age, millions of years ago, when their planet was favorable to the origin of life, or they might be immigrants from a favored planet.
What does the word "cheer" (Para 1,) imply?
选项
A、Imaginative men are sure of success in finding life on other planets.
B、Imaginative men are delighted to find life on other planets.
C、Imaginative men are happy to find a different kind of life existing on other planets.
D、Imaginative men can be pleased with the idea that there might exist different forms of life on other planets.
答案
D
解析
文章第一段“cheer…that life need not resemble closely…”,可知他们快活(cheer)的原因是外星球生命可以有不同的形式(different forms of life)。选D。
转载请注明原文地址:https://kaotiyun.com/show/TzHO777K
0
研究生英语学位课统考(GET)
相关试题推荐
G.Barela,afamousfootballplayer,was______toManchesterUnitedin2013byamillionpounds.
ChlorineisamainstayinmostswimmingpoolsintheUnitedStates,andisusedtoeradicatebacteria.Abacteria-freepoolwill
Whyaresomanypeopleunhappyintheirjobs?Therearetwoprimaryreasons.First,somepeopleareconvincedthatearningaliv
Youmayhavewonderedwhythesupermarketsareallthesame.Itisnotbecausethecompaniesthatoperatethemlackimagination.
Giventheadvantageofelectronicmoney,youmightthinkthatweshouldmovequicklytothecashlesssocietyinwhichallpaymen
Themultibillion-dollarinternationalpharmaceuticalindustryhasbeenaccusedofmanipulatingtheresultsofdrugtrialsforfi
______inflation,drivenbyrisingfoodandoilcosts,isstrikinghardestattheworld’sverypoor,whoareforcedtospend60t
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocomeinblindingflashesorastheresultofdramatic
ValetaYoung,81,aretireefromLodi,Calif.,suffersfromcongestiveheartfailureandrequiresalmostconstantmonitoring.B
随机试题
A.痰饮B.溢饮C.支饮D.悬饮饮邪停于胸者称为
A.腹水ADA增高B.腹水淀粉酶300U/LC.腹水SAAG20g/LD.乳糜腹水E.血性腹水腹腔淋巴结结核
该患者患何病:选用何方:
男性,30岁,10年来阵发性心悸,每次心悸突然发作,持续半小时至3小时不等,此次发作持续半小时而来就诊。检查:血压90/60mmHg,心率200次/分,心律绝对规则,无杂音,肺(一)估计此次心律失常最可能的是
早期诊断化脓性关节炎,最有确诊价值的检查是
解热镇痛抗炎药的作用机制是
()是发展规划的基本内容,是政府为实现发展目标而采取的一系列手段和对策。
下列有关商业银行贷款的表述不正确的是()。
=________.
WhatcanwelearnfromGetRichSlowly?
最新回复
(
0
)