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
2024-02-18
11
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] 【S7】
选项
答案
O
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3462271.html
相关试题推荐
Perhapsthemostastonishingtheorytocomeoutofkinetics,thestudyofbo
Perhapsthemostastonishingtheorytocomeoutofkinetics,thestudyofbo
Perhapsthemostastonishingtheorytocomeoutofkinetics,thestudyofbo
Perhapsthemostastonishingtheorytocomeoutofkinetics,thestudyofbo
Perhapsthemostastonishingtheorytocomeoutofkinetics,thestudyofbo
PerhapslikemostAmericansyouhavesomeextrapoundsto【S1】______.Youmaye
PerhapslikemostAmericansyouhavesomeextrapoundsto【S1】______.Youmaye
PerhapslikemostAmericansyouhavesomeextrapoundsto【S1】______.Youmaye
PerhapslikemostAmericansyouhavesomeextrapoundsto【S1】______.Youmaye
PerhapslikemostAmericansyouhavesomeextrapoundsto【S1】______.Youmaye
随机试题
校对题:通读并纠正校样中的错误。(本题20分)
影响可燃气体爆炸极限的因素不包括()。A.初始温度 B.初始压力 C
档案行政诉讼的基本原则可以分为一般原则和特有原则,其中特有原则包括以下内容:(
下列不属于项目管理特点的是()。A.组织的临时性和开放性 B.创新性 C.高
模仿是在_____的基础上进行的。
共用题干 朱某以正常市场价格200万元购买了一套建筑面积为160㎡位于一层的商
对于某一系统而言,它既是由一些次系统(要素)组成,它自身又是更大系统的超系统(要
“禁止合闸,线路有人工作!”标示牌式样字样为()。(A)红底黑字(B)黑底红
机动车辆第三者责任险的责任免除项目包括( )。 A.被保险人所有或代管的财
()不属于我国社会政策的主要领域。A.军事政策 B.住房保障政策 C.
最新回复
(
0
)