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[跟可可背精美短文] 跟可可背精美短文 第18篇:Creating Colors创造颜
在线试听和英语短文Creating Colors There are two ways to create colors in a photograph. One method, called additive, starts with three basic colors and adds them together to produce some other colors2008-11-25 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第17篇:Collectibles收藏品
在线试听和英语短文Collectibles Collectibles have been a part of almost every culture since ancient times. Whereas some objectshave been collected for their usefulness, others have been selected for2008-11-24 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第16篇:Colds and Age感冒与年龄
在线试听和英语短文Colds and Age A criticalfactorthatplays a part in susceptibility to coldsis age.Astudy donebythe University of ichigan School of Public Health revealed particulars that seem to hold2008-11-23 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第15篇:Cohesion-tension T
在线试听和英语短文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 very2008-11-22 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第14篇:Coal-fired Power P
在线试听和英语短文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 large a2008-11-21 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第13篇:Chimpanzee黑猩猩
在线试听和英语短文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 departu2008-11-20 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第12篇:Children's Numeric
在线试听和英语短文Children's Numerical Skills People appear to be born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock o2008-11-19 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第11篇:Changing Roles of
在线试听和英语短文Changing Rolesof Public Education One of the most important social developments that helped to make possible a shift in thinking about the role of public education was the effect of2008-11-18 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第10篇:Cells and Temperat
在线试听和英语短文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 mamm2008-11-17 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第9篇:British Columbia 英属
在线试听和英语短文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) nor2008-11-16 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第8篇:Botany植物学
在线试听和英语短文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 humans2008-11-13 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第7篇:Bacteria细菌
在线试听和英语短文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 of a2008-11-12 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第6篇:Archaeology考古学
在线试听和英语短文Archaeology Archaeology is a source of history, not just a humble auxiliary discipline. Archaeological data are historical documents in their own right, not mere illustrations to w2008-11-11 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第5篇:Animals' Compasses动
在线试听和英语短文Animals' Compasses Researchers have found that migrating animals use a variety of inner compasses to help them navigate. Some steer by the position of the Sun. Others navigate by2008-11-10 编辑：alex 标签：
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[跟可可背精美短文] 跟可可背精美短文 第4篇:Andrew Carnegie安德鲁·
在线试听和英语短文Andrew Carnegie Andrew Carnegie, known as the King of Steel, built the steel industry in the United States, and, in the process, became one of the wealthiest men in America. His su2008-11-09 编辑：alex 标签：
