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- 英语六级考试备考晨读美文——The Language of Music
- The Language of Music
A painter hangs his or her finished picture on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——British Columbia
- British Columbia
British Columbia is the third largest Canadian province, both in area and population. It is nearly 1.5 times as large as Texas, and extends 800 miles (1,280km)...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Botany
- Botany
Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For many thousands of years it was the one field of awareness about which hu...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Plankton
- Plankton
Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Raising Oysters
- Raising Oysters
In the past oysters were raised in much the same way as dirt farmers raised tomatoes - by transplanting them. First, farmers selected the oyster bed, cleared th...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Oil Refining
- Oil Refining
An important new industry, oil refining, grew after the Civil War. Crude oil, or petroleum -- a dark, thick ooze from the earth -- had been known for hundreds of y...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Plate Tectonics and Sea-floor Spreading
- Plate Tectonics and Sea-floor Spreading
The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes a...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Icebergs
- Icebergs
Icebergs are among nature's most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being -- som...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Topaz
- Topaz
Topaz is a hard, transparent mineral. It is a compound of aluminum, silica, and fluorine. Gem topaz is valuable. Jewelers call this variety of the stone "precious topaz"....
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——The Salinity of Ocean
- The Salinity of Ocean
Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are i...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Cohesion-tension Theory
- Cohesion-tension Theory
Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its v...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——American Black Bears
- American Black Bears
American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these bears have shiny black fur, but in...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Coal-fired Power Plants
- Coal-fired Power Plants
The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel with which to generate lar...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Statistics
- Statistics
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of g...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Obtaining Fresh Water from Icebergs
- Obtaining Fresh Water from Icebergs
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a jok...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——The Source of Energy
- The Source of Energy
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Vision
- Vision
Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well than t...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Lighthouses
- Lighthouses
The first navigational lights in the New World were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Bacteria
- Bacteria
Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Sleep
- Sleep
Sleep is part of a person's daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Folk Cultures
- Folk Cultures
A folk culture is a small isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous in custom and race with a strong family or clan stru...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Cells and Temperature
- Cells and Temperature
Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme systems of...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Marine Mammals
- Marine Mammals
Since there is such an abundance of food in the sea, it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——Chimpanzee
- Chimpanzee
The most striking single fact about chimpanzees is the flexibility of their social life, the lack of any rigid form of organization. It represents about as far a dep...
2011-11-25 英语六级阅读资料 -
- 英语六级考试备考晨读美文——The Organic Foods
- The Organic Foods
Are organically grown foods the best food choices?The advantages claimed for such foods over conventionally grown and marketed food products are now being deb...
2011-11-25 英语六级阅读资料
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