吉林财经大学2018年第一学期研究生期末考试试题及答案
一、阅读理解
A
A new look at an asteroid orbiting the sun shows it could possibly smash into the Earth with tremendous force. But experts say the potential impact is still 872 years away, time enough for the speeding space rock to alter its cour.
Named 1950DA, the asteroid--1 kilometer wide--is the most threatening to the Earth of all of the known large asteroids, but the odds are only adout one in 300 that it would impact the planet, rearchers said. "One in 300 is pretty long odds," said Jon D. Giorgini, a scientist in Califonia. "I'm not personally going to worry about it. It is so far in the future that lots of things could change."
There are approximately 1,000 asteroids bigger than a kilometer that can pass near the Earth in their orbit of the sun. About 580 have been found and their orbits plotted. Of the,
only 1950DA reprents a possible threat. Scientists continue an effort to identify all the other large asteroids that pass near the Earth, and it is their great hope that they don't find any that are greater threats. If 1950DA did hit the Earth, said Giorgini, it would have planet-wide effects, tting off fires, changing the weather and perhaps creating immen tidal waves. But it would not be a planet killer like the asteroid thought to have snuffed out the dinosaure some 65 millions years ago.
Asteroid 1950DA was first discovered in 1950, but then not noted in astronomy logs again for decades. It was rediscovered in the year 2000 and in March 2001 whizzed within about 77 million miles of Earth, giving astronomers an opportunity to gather visual and radar readings. From that, the astronomers projected the orbital path 1950DA would take on its next 15 near pass of the Earth--over a period covering nearly nine centuries. For the 15th near pass, on March 16,2880, the analysis showed it was mathematically possible, though unlikely, that the asteroid could hit the Earth.
He said the highest probability is that the asteroid in 2880 will miss the Earth by about 29
0, 000 kilometers--a distance clor than the 370, 000-kilometer orbit of the Moon around the Earth.
21.Talking about asteroids, the author tells us that ______.
A．nothing can alter the cour of an asteroid in its orbit of the sun
B．only about one in 300 asteroids near the sun would hit the Earth
C．scientist have managed to identify all the asteroids orbiting the sun
D．there is no immediate threat to the Earth from an asteroid
22.We can infer from the passage that __________________________.
A larger asteroids are more likely to smash into the Earth
B an asteroid will probably just miss the Earth in 2880
C asteroids will eventually destroy everything on Earth
D no asteroid was noted in astronomy logs before 1950
23. Judging from the context, the word \________________________________.
A kept turning around
B went into and out of its orbit quickly
C moved very fast
D exploded all the while
24. According to the passage, which of the following statements is true?
A Scientists have managed to know everything about asteroid 1950 DA.
B Many people em to be worried about the predicted asteroid smash.
C Scientists are still quite optimistic about man's future.
D The Earth is faced with frequent threats from space.
25. The best title for the passage is _____________________________.
A Possible Asteroid Smash in 2880
B New Discoveries about 1950 DA
C Asteroids in the Solar System
D Earth -- an Unsafe Place for Life
B
Did you know that all human beings have a "comfort zone" regulating the distance they stand from someone when they talk？ This distance varies in interesting ways among people of different cultures.
Greeks, some of the Eastern Mediterraneen, and many of tho from South America normally stand quite clo together when they talk, often moving their faces even clor as they warm up in a conversation. North Americans find this awkward and often back aw
ay a few inches. Studies have found that they tend to feel most comfortable at about 21 inches apart. In much of Asia and Mrica, there's even more space between two speakers in conversation. This greater space subtly lends an air of dignity and respect. This matter of space is nearly always unconscious, but it is interesting to obrve.
This difference applies also to the cloness with which people sit together, the extent to which they lean over one another in conversation, how they move as they argue or make an emphatic (强调的) point. In the United States, for example, people try to keep their bodies apart even in a crowded elevator, in Paris they take it as it comes!
Although North Americans have a relatively wide" comfort zone" for talking, they communicate a great deal with their hands--not only with gesture but also with touch. They put a sympathetic hand on a person' s shoulder to demonstrate warmth of feeling, or an arm around him in sympathy; they pat an arm in reassurance(放心)or stroke a child's head in fondness; they readily take someone's arm to help him across a street or direct him along an unfamiliar mute. To many people -- especially tho from Asia or the
Moslem(穆斯林) countries--such bodily contact is unwelcome, especially if done with the left hand. The left hand carries no special significance in the U. S. Many Americans are simple left and u that hand more.
