大学职业搜题刷题APP
下载APP
首页
课程
题库模板
Word题库模板
Excel题库模板
PDF题库模板
医考护考模板
答案在末尾模板
答案分章节末尾模板
题库创建教程
创建题库
登录
logo - 刷刷题
创建自己的小题库
搜索
【单选题】

Of all the problems facing modern astronomers, perhaps the most fascinating is: 'Can intelt 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 intelt 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 suce 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 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 nineth 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 ' which would show the existence here of intelt 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 suce of Mars, thereby 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 ______.

A.
there may be other intelt beings in the universe
B.
there are other intelt beings in the universe
C.
people living on the earth are almost certainly the only intelt beings in the universe
D.
people living on the earth are definitely the only intelt beings in the universe
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
收藏 - 刷刷题收藏
举报
参考答案:
举一反三

【单选题】快原子轰击质谱为

A.
FD-MS
B.
EI-MS
C.
FAB-MS
D.
LSI-MS
E.
ESI-MS

【多选题】“火星人来了”活动的目的是()。

A.
活跃团体气氛,舒展身体
B.
缩小学生之间的空间距离和心理距离
C.
让学生感受到老师的热情
D.
分享团体沟通和合作的过程

【单选题】X线管内电子轰击的面积称( )

A.
大焦点
B.
小焦点
C.
有效焦点
D.
双焦点
E.
实际焦点
相关题目:
【单选题】快原子轰击质谱为
A.
FD-MS
B.
EI-MS
C.
FAB-MS
D.
LSI-MS
E.
ESI-MS
【多选题】“火星人来了”活动的目的是()。
A.
活跃团体气氛,舒展身体
B.
缩小学生之间的空间距离和心理距离
C.
让学生感受到老师的热情
D.
分享团体沟通和合作的过程
【单选题】X线管内电子轰击的面积称( )
A.
大焦点
B.
小焦点
C.
有效焦点
D.
双焦点
E.
实际焦点
刷刷题-刷题-导入试题 - 刷刷题
参考解析:
AI解析
重新生成
题目纠错 0
发布
刷刷题-刷题-导入试题 - 刷刷题刷刷题-刷题-导入试题 - 刷刷题刷刷题-刷题-导入试题 - 刷刷题
刷刷题-刷题-导入试题 - 刷刷题
刷刷题-刷题-导入试题 - 刷刷题
刷刷题-单词鸭