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跟可可背精美短文 第22篇:Folk Cultures民间文化
在线试听和英语短文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 structure2008-11-29 编辑：alex 标签： 我来听写
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跟可可背精美短文 第21篇:Evolution of Sleep睡眠的进化
在线试听和英语短文Evolution of Sleep Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as f2008-11-28 编辑：alex 标签： 我来听写
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跟可可背精美短文 第20篇:Evolution and Wheels进化与轮子
在线试听和英语短文Evolution and Wheels In the past, evolutionary biologists contemplating the absence of wheels in nature agreed that the explanation was not undesirability: wheels would be good for2008-11-27 编辑：alex 标签： 我来听写
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跟可可背精美短文 第19篇:Electricity电
在线试听和英语短文Electricity The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like wit2008-11-26 编辑：alex 标签： 我来听写
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跟可可背精美短文 第18篇:Creating Colors创造颜色
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： 我来听写
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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： 我来听写
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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： 我来听写
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跟可可背精美短文 第15篇:Cohesion-tension Theory内聚压力理论
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： 我来听写
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跟可可背精美短文 第14篇:Coal-fired Power Plants火力发电厂
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： 我来听写
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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： 我来听写
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跟可可背精美短文 第12篇:Children's Numerical Skills儿童的数学能力
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： 我来听写
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跟可可背精美短文 第11篇:Changing Roles of Public Education公共教育
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： 我来听写
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跟可可背精美短文 第10篇:Cells and Temperature细胞与温度
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： 我来听写
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跟可可背精美短文 第9篇:British Columbia 英属哥伦比亚
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： 我来听写
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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： 我来听写
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