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1970-01-01 编辑：
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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 mammals and birds are mo2006-05-12 编辑：admin
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[新东方背诵文选] BBC新闻1月28日第277期新闻讲解PDF文本+LRC字幕+mp3
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 a millimeter: a pinh2006-05-12 编辑：admin
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[新东方背诵文选] VOA慢速1月28日第298期新闻讲解PDF文本+mp3+LRC字幕
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 structure and highly develop2006-05-12 编辑：admin
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[新东方背诵文选] CNN新闻重点讲解(2010-01-27)
44.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 joke more appropriate t2006-05-12 编辑：admin
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[新东方背诵文选] VOA常速1月27日第273期新闻讲解PDF文本+mp3+LRC字幕
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 government units (states2006-05-12 编辑：admin
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[新东方背诵文选] BBC新闻1月27日第276期新闻讲解PDF文本+LRC字幕+mp3
42.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 amounts of electr2006-05-12 编辑：admin
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1970-01-01 编辑：
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1970-01-01 编辑：
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1970-01-01 编辑：
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1970-01-01 编辑：
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[] BBC新闻1月30日第279期新闻讲解PDF文本+LRC字幕+mp3
1970-01-01 编辑：
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[] VOA慢速1月30日第300期新闻讲解PDF文本+mp3+LRC字幕
1970-01-01 编辑：
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[] CNN新闻重点讲解(2010-01-29)
1970-01-01 编辑：
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[大学四级听力模拟题] VOA常速2月2日第279期新闻讲解PDF文本+mp3+LRC字幕
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[大学四级听力模拟题] BBC新闻2月2日第282期新闻讲解PDF文本+LRC字幕+mp3
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[大学四级听力模拟题] VOA慢速2月2日第303期新闻讲解PDF文本+mp3+LRC字幕
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