文章列表

• 1.英语美文背诵 Bacteria
• Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. O...
• 2.英语美文背诵 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 s...
• 3.英语美文背诵 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 im...
• 4.英语美文背诵 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 Suns very cen...
• 5.英语美文背诵 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...
• 6.英语美文背诵 Statistics
• Statistics There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to ke...
• 7.英语美文背诵 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 ...
• 8.英语美文背诵 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 brown, r...
• 9.英语美文背诵 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 tr...
• 10.英语美文背诵 The Salinity of Ocean Waters
• 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...