首页
登录
职称英语
Of all the problems facing modern astronomers, perhaps the most fascinating
Of all the problems facing modern astronomers, perhaps the most fascinating
游客
2023-07-17
15
管理
问题
Of all the problems facing modern astronomers, perhaps the most fascinating is: "can intelligent life exist【S1】______?" 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【S2】______out at once; it has hardly any atmosphere. Venus is little better; the surface temperature is extremely high and the【S3】______is mostly carbon dioxide. Mars with a very thin atmosphere and a severe【S4】______of water may well support simple plant life but there seems no hope of finding animals, while the attractive Martians of the story-tellers have long since been given up.
Of course this has not stopped the flow of bright ideas for【S5】______with the supposed people on Mars. In the early nineteenth century the great mathematician Gauss suggested planting tree-patterns in Siberia, so that the Martians would see them and reply【S6】______Following up this idea, the Austrian scientist Karl Littrow proposed digging very wide ditches in the Sahara, triangular in pattern, and then filling them with petrol or some such substance so that, 【S7】______lit, the ditches would present Martian observers with a "flaming triangle"【S8】______would show the existence here of intelligent minds. Even better were the plans of Charles Cros, a French writer of the eighteen-seventies, who wanted to build a large mirror to reflect the sun’s rays and concentrate them on the surface of Mars, 【S9】______ making a vast burning-glass. By swinging the mirror around, Cros explained, it would be practicable to write words in the Martian deserts simply by burning the sand. For many years he bombarded the French government with literature about this plan and was very【S10】______when no official interest was shown.
A. ruled B. communicating C. sufficiency D. elsewhere
E. which F. disappointed G. carried H. suitably
I. atmosphere J. although K. thereby L. excitedly
M. shortage N. surface O. when [br] 【S4】
选项
答案
M
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2846004.html
相关试题推荐
Modernmedicaladvances______theaveragelifeexpectancybyseveralyears.A、ex
Theyhadto______betweenproblemsbecauseofalackofabilityfromthoseofa
Concrete,whichisusedinawiderangeinmodernsociety,______ofcement,san
Somecountriesinthedisasterareashavedifficultyinsolvingtheproblemsof
A、Youwillnotgetthejob.B、Itperhapshasnoinfluenceonyourgettingthejo
GrowingupasanAsianinBritainismuchmorethanaquestionoffacingdis
GrowingupasanAsianinBritainismuchmorethanaquestionoffacingdis
GrowingupasanAsianinBritainismuchmorethanaquestionoffacingdis
[originaltext]W:Idecidetospeaktomyboss’smotheraboutmyproblemsatwor
Althoughhestillhassomeproblemstoface,______hisworkhasbeensuccessful
随机试题
Dr.GregoryConnollyisdirectoroftheofficefornon-smokingandhealthi
[img]2014m9s/ct_etoefm_etoeflistz_0397_20149[/img][br]Whatdoesthestudentte
2017年,教育部将历史教材中“八年抗战”一律改为“十四年抗战”,全面反映日本侵
q.6h.的含义是A.每日6次 B.每晨6时 C.每小时6次 D.每6日1
智能变电站500千伏变压器保护告警信息低小区差差流越限属于危急缺陷
玄兔∶太阴∶月亮A.垂髫∶黄发∶老人 B.束发∶及笄∶儿童 C.黄口∶耳顺∶
目前我国A股账户不可用于买卖()。 A.B股B.人民币普通股票 C
下列药品中,孕妇禁用的是A.维生素A B.环丙沙星 C.拉贝洛尔 D.葡萄
双端固定桥的一端基牙受到垂直向外力时,固定桥将会产生旋转移动,其旋转中心立于A:
(2021年真题)下列原则中,不属于政府间事权及支出责任划分应遵循的原则是()
最新回复
(
0
)