酷兔英语

『经典背诵短文【41】American black bears』

American black bears American black bears appear in a variety of colors despite their name. In the...

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『经典背诵短文【40】Cohesion-tension Theory』

Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. B...

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『经典背诵短文【45】The source of Energy』

The source of Energy A summary of the physical and chemical nature of life must begin, not on the ...

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『经典背诵短文【43】Statistics』

Statistics There were two widely divergent influences on the early development of statistical meth...

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『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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『经典背诵短文【46】Vision』

Vision Human vision like that of other primates has evolved in an arboreal environment. In the den...

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『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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『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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『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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『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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