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粗纤维(名词解释)

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复合预混料(名词解释)

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Write a note of about 50 - 60 words based on the following situation: You are writing

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What is the passage mainly concerned about？

A. The difference between dream and dreamless sleep of human beings.
B. Why animals with distinctive life style. sleep differently.
C. Deep dream sleep of predators.
D. Stupid animals and smart animals.

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初水分(名词解释)

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