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『经典背诵短文【44】Obtaining Fresh water from icebergs』

『经典背诵短文【44】Obtaining Fresh water from icebergs』

Obtaining Fresh water from icebergs The concept of obtaining fresh water from icebergs that are to...

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2009-10-03

『经典背诵短文【49】Sleep』

『经典背诵短文【49】Sleep』

Sleep Sleep is part of a person’s daily activity cycle. There are several different stages of slee...

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2009-10-03

『经典背诵短文【48】Bacteria』

『经典背诵短文【48】Bacteria』

Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or c...

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2009-10-03

『经典背诵短文【47】Folk Cultures』

『经典背诵短文【47】Folk Cultures』

Folk Cultures A folk culture is a small isolated, cohesive, conservative, nearly self-sufficient g...

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2009-10-03

『经典背诵短文【50】Cells and Temperature（End）』

『经典背诵短文【50】Cells and Temperature（End）』

Cells and Temperature Cells cannot remain alive outside certain limits of temperature and much nar...

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2009-10-03

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