[听力原文]
When we accept the evidence of our unaided eyes and describe the Sun as a yellow star, we have summed up the most important single fact about it—at this moment in time. It appears probable, however, that sunlight will be the color we know for only a small part of the Sun’s history.
Stars, like individuals, age and change. As we look out into space. We see around us stars at all stages of evolution. There are faint bloodred dwarfs school that their surface temperature is a mere 4,000 degrees Fahrenheit, there are searing ghosts blazing at 100,000 degrees Fahrenheit and almost too hot to be seen, for the great part of their radiation is in the invisible ultraviolet range. Obviously, the "daylight" produced by any star depends on its temperature; today (and for ages to come) our Sun is at about 10,000 degrees Fahrenheit, and this means that most of the Sun’s light is concentrated in the yellow band of the spectrum, falling slowly in
A. Red.
B. Violet.
C. Yellow.
D. White.
[听力原文]
When we accept the evidence of our unaided eyes and describe the Sun as a yellow star, we have summed up the most important single fact about it—at this moment in time. It appears probable, however, that sunlight will be the color we know for only a small part of the Sun’s history.
Stars, like individuals, age and change. As we look out into space. We see around us stars at all stages of evolution. There are faint bloodred dwarfs school that their surface temperature is a mere 4,000 degrees Fahrenheit, there are searing ghosts blazing at 100,000 degrees Fahrenheit and almost too hot to be seen, for the great part of their radiation is in the invisible ultraviolet range. Obviously, the "daylight" produced by any star depends on its temperature; today (and for ages to come) our Sun is at about 10,000 degrees Fahrenheit, and this means that most of the Sun’s light is concentrated in the yellow band of the spectrum, falling slowly in
A. The dangers of invisible radiation.
B. Faint dwarf stars.
C. The Sun’s fuel problem.
D. The evolutionary cycle of the Sun.
[听力原文]
Before we begin our tour, I’d like to give you some background information on the painter Grand Wood. We’ll be seeing much of his work today. Wood was born in 1881 in Iowa farm country, and became interested in art very early in life. Although he studied art in both Minneapolis and Chicago, the strongest influences on his art work were European. He spent time in both Germany and France and his study there helped shape his own stylized form of realism. When he returned to Iowa, Wood applied the stylistic realism he had learned in Europe to the rural life he saw around him and that he remembered from his childhood around the turn of the century. His portraits of farm families imitate the still formalism of photographs of early settlers posed in front of their homes. His paintings of farmers at work, and of their tools and animals, demonstrate a serious respect for the life of the mid-western United States.
By the 1930’s, Wood was a leading f
A. A professor.
B. A tour guide.
C. A painter.
D. An art dealer.
[听力原文]
M: Where shall we go for our holiday this year
W: Let’ s have a change. I’ m tired of Spain. How about Italy or Greece
[听力原文] 11-15
We do not know when men first began to use salt, but we do know that it has been used in many different ways through out history. Historical evidence shows, for example, that people who lived over 3 000 years ago ate salted fish. Thousands of years ago in Egypt, salt was used to keep the dead from decaying.
Stealing salt was considered a crime during some periods of history. In the 18th century for instance, if a person were caught stealing salt, he could be put in jail. History records that about ten thousand people were put in jail during that century for stealing salt! About 150 years before, in the year 1553 ,taking more than one’s share of salt was punished as a crime. The offender’s ear was cut off!
Salt was an important item on the table of a king. It was traditionally placed in front of the king when he sat down to eat. Important guests at the king’s table were seated near the salt. Less important guests were given se
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