大学英语听说unit 15_大学英语听说第一册
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Unit 15
Part A
Excercises 1
Answers:
1.Exercise 2
1）
Part B
Paage 1
Exercise 1：
Questions:
1.What happened on July 29, 2005 ?
2.What was Dr Brown’s reason to claify the newly discovered object as a
planet ?
3.Why were the two other astronomers unable to detect the motion of the new
planet when they first discovered it?
4.What have the scientists been doing in the last seven months?
5.What can you infer from the paage? Exercise2
Answers:
scripts:the 10th planet?
On July 29,2005 Dr Mike Brown of the California Institute of Technology announced the discovery of a new planet in the solar system.The planet, which hasn’t been officially named yet, was found by Brown and his colleagues in California.It is currently about 97 times farther from the sun than Earth.This places the new planet more or le in a dark realm beyond Neptune where thousands of small icy bodies orbit the sun.The planet appears to be typical of such objects — only much bigger.Its sheer size in relation to the nine known planets means that it can only be calified as a planet itself, Brown says.The planet was also discovered by two other astronomers, Chad Trujillo in Hawaii, and David Rabinowitz of Yale University.They first photographed the new planet on October 31, 2003.the object was so far away, however, that its motion was not detected until they reanalyzed the data in january of this year.In the last seven months, the scientists have been studying the planet to better estimate its size and its motions.This new planet is the largest object found in orbit around the sun since the discovery of Neptune and its moon Triton in 1846.It is larger than Pluto, which was discovered in 1930.The planet’s temporary name is 2003 UB 313.a permanent name has been proposed by the discovers to the International Astronomical Union, and they are waiting for the decision of this body before announcing the name.Paage 2
Questions for Exercise 1
1.Why did the 5-year-long war between the Medes and the Lydians suddenly stop ?
2.What happened in 1991?
3.Why was the solar eclipse in 1991 called “the Eclipse of the Century”?
4.What interesting things happened during the 1991 eclipse?
5.What can you infer from the paage? Answers to Exercise 2
Scripts: a solar eclipse
On May 28 in 585 BC the Medes, who were from what is now northern Iran, were in battle with the Lydians who lived in what is now Turkey.To the horror of both sides, the sun disappeared.The war had been going on for five years, but the Meedes and Lydians were so frightened at this ill omen that they made peace.Today, astronomers are able to explain such disappears of the sun.on its trip around the earth, if the moon paes directly between the sun and the earth, then it prevents rays of the sun from reaching the earth and causes a temporary darkening.This is what is known as a solar eclipse.A solar eclipse can last as long as seven and a half minutes.During the 20th century 228solar eclipses, mostly partial ones, have taken place.In 1991, there was a total eclipse of the sun.because the moon paed directly in the line of sihgt between the sun and the earth, its shadows spread a path of darkne acro the land.This path extended from Hawaii to South America in what astronomers called “the Eclipse of the Century.”
Instead of being frightened by the eclipse as had ancient peoples, people flocked to Hawaii and Mexico to view the awesome sight.Scientists viewed the eclipse from an observatory on a volcanic peak in Hawaii.In the continental United States, however, only a partial eclipse occurred.Unfortunately, as a result of a cloud cover, this partial eclipse was barely visible.Interesting things happened during the 1991 eclipse.For example, animals in a zoo in Mexico City headed into their dens when the eclipse began.When sun reappeared, roosters crowed as if it were morning.And light-sensitive lamps flickered on at the beginning of the eclipse and flickered off at the end.Part D:
Paage 1: 1)2)3)4)th
5)1)2)3)4)Paage 2:
1)2)3)4)5)6)7)8)9)10)
