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
Of all the problems facing modern astronomers, perhaps the most fascinating is: "Can intelligent life exist elsewhere?" Since th
Of all the problems facing modern astronomers, perhaps the most fascinating is: "Can intelligent life exist elsewhere?" Since th
admin
2010-08-04
68
问题
Of all the problems facing modern astronomers, perhaps the most fascinating is: "Can intelligent life exist elsewhere?" Since the Earth is an unimportant planet moving round an unimportant star, it would be a pride on our part to suppose that we are the only intelligent beings in the universe. But to obtain proof is difficult.
The main trouble is that our neighbor worlds, the bodies in the Solar system appear to be unsuitable for advanced life-forms. The Moon may be ruled out at once; it has hardly any atmosphere. Venus(金星) is little better; the surface temperature is extremely high and the atmosphere is mostly carbon dioxide. Mars with a very thin atmosphere and a severe shortage of water, may well support simple plant life but there seems no hope of finding animals, while the attractive Martians(火星人) of the story-tellers have long since been given up.
Of course this has not stopped the flow of bright ideas for communicating with the supposed people on Mars. In the early nineteenth century the great mathematician Gauss suggested planting treepatterns in Siberia(西伯利亚), so that the Martians would see them and replay suitably. Following up this idea, the Austrian scientist Karl Littrow proposed digging very wide ditches in the Sahara, triangular in patterns, and then filling them with petrol or some substance so that, when lit, the ditches would present Martian observers with a "flaming triangle" which would show the existence here of intelligent minds. Even better were the plans of Charles Cross, a French writer of the 1870’s, who wanted to build a large mirror to reflect the sun’s rays and concentrate them on the surface of Mars, thereby making a vast burning-glass. By swinging the mirror around, Cross explained it would be practicable to write words in the Martian deserts simply by burning the sand. For many years he bombared(轰击) the French government with literature about this plan and was very disappointed when no official interest was shown.
The opinion of the writer is that ______.
选项
A、there may be other intelligent beings in the universe
B、there are other intelligent beings in the universe
C、people living on the earth are almost certainly the only intelligent beings in the universe
D、people living on the earth are definitely the only intelligent beings in the universe
答案
A
解析
文章第一段第一句就提出问题“别的星球可能存在智慧生命吗?”而后又说:我们会认为自己是宇宙中惟一的智慧生命,但要证实它却很困难。可以看出作者同意有外星人的可能性,即A)项正确。B)认为宇宙里有其他智慧生命,过于肯定;C)认为地球上居住的人们几乎就是宇宙中惟一的智慧生命,与作者意见相左;D)较C)语气更为肯定。故可排除C),D)。
转载请注明原文地址:https://kaotiyun.com/show/j1A7777K
0
大学英语四级
相关试题推荐
HIVandItsTransmissionResearchhasrevealedagreatdealofvaluablemedical,scientific,andpublichealthinformationa
HIVandItsTransmissionResearchhasrevealedagreatdealofvaluablemedical,scientific,andpublichealthinformationa
Testinghasreplacedteachinginmostpublicschools.Myownchildren’sschoolweekisframedbypretests,drills,tests,andre
A、Tomakethewomanangry.B、Topleasetheman’smother.C、Davidistheman’sgoodfriend.D、Davidisgoodatcarryingonconver
Theconceptionofpovertyandwhatto【C1】______aboutithavechangedoverthedecades.UnderSocialDarwinismthelazyandthe【C
A、Sitstretchingtheirfeetoutinfrontofthem.B、Sitputtingtheirlegsbehindthem.C、Sitcrossingonelegandstretchingth
A、BecausetheEarthisheavilypolluted.B、Becausenaturecannotrecycleitsresources.C、Becausetherearemoreandmorepeople
A、Moreenvelopesshouldbeprepared.B、Heshouldwritemoreletters.C、Heshouldshowmorerespectforhisemployees.D、Heshoul
Overthepast600years,Englishhasgrownfromalanguageoffewspeakerstobecomethedominantlanguageofinternationalcomm
Overthepast600years,Englishhasgrownfromalanguageoffewspeakerstobecomethedominantlanguageofinternationalcomm
随机试题
女性,40岁,已婚。下腹部坠胀痛20天,剧痛2小时。3小时前妇科检查后出现腹痛加剧,1小时后突然出现晕厥、休克,持续约30分钟,经输液等抢救清醒后转上级医院。9年前因交通事故致“肠破裂”行手术修补,否认肝炎、结核等传染病史。月经规律,13岁初潮,5/30天
人民法院适用普通程序审理案件,应当自立案之日起()审结。
()是指通过对违反会计职业道德行为和违法会计行为典型案例进行讨论和剖析,从中得到警示,提高法律意识,加强会计职业道德观念和辨别是非的能力。
下列选项中,( )不属于要约发出以后,不发生效力或消灭其效力的情况。
消费税不是在生产、流通、消费所有环节征收,其纳税环节主要是在生产经营过程中的某一特定环节。()
在消化过程中分解为糖的食物是人体血液内葡萄糖的来源,饮用咖啡后,在消化过程中并不能分解为糖。然而,人饮用不加糖和奶的咖啡后,也会引起血液葡萄糖的大量增加。以下哪项帮助解释咖啡对血液葡萄糖水平的作用?
设函数f(x)在区间[0,4]上连续,且,求证:存在ξ∈(0,4)使得f(ξ)十f(4一ξ)=0.
Canadianpoliceand【D1】______teamswereworkingTuesdayafternoonto【D2】______about300peoplestrandedafterwhatalocaloffic
ExchangeRates:ABriefHistoryofExchangeRatesForcenturies,thecurrenciesoftheworldwerebackedbygold.Thatis,a
A、Peoplewhoeatspoiledfoodmaygetsick.B、Farmershavetothrowawayspoiledproducts.C、Farmershavetosellthespoiledpr
最新回复
(
0
)