Of all the problems facing modern astronomers, perhaps the most fascinating one is "can intelligent life exist elsewhere" Since the earth is a 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 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 that life seems no hope of finding animals, while the alternative Martians of the story-tellers have since been given up.
Of course this has not stopped the flow of bright ideas of communicating with the supposed people on Mars. In the early ninet
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
| Of all the problems facing modern
astronomers, perhaps the most fascinating one is "can intelligent life exist
elsewhere" Since the earth is a 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 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 that life seems no hope of finding animals, while the alternative Martians of the story-tellers have since been given 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 [单项选择]The book from which "all modern American literature comes" refers to ______.
A. The Adventure of Huckleberry Finn B. The Great Gatsby C. An American Tragedy D. Sister Carrie [单项选择]A modern newspaper is remarkable for all the following except its ______.
A. wide coverage B. uniform style C. speed in reporting news D. popularity [单项选择] Of all modern instruments, the violin is apparently one of the simplest. It consists in
essence of a hollow, varnished wooden sound box, or resonator, and a long neck, covered
with a fingerboard, along which four strings are stretched at high tension. The beauty of
design, shape, and decoration is no accident: the proportions of the instrument are
(5) determined almost entirely by acoustical considerations. Its simplicity of appearance is
deceptive. About 70 parts are involved in the construction of a violin, Its tone and its
outstanding range of expressiveness make it an ideal solo instrument. No less important.
however, is its role as an orchestral and chamber instrument. In combination with the
larger and deeper-sounding members of the same family, the violins form the nucleus
(10)of the modern symphony orchestra.
The violin has been in existence since about 1550. Its importance as an instrument
in its own right dates from t
A. resonator (line 2) B. solo (line 7) C. left-hand technique (line 25) D. fingering patterns (lines 25-26) 我来回答: 提交
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