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What's alive?

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轉寄 列印
第1級人氣樹(0)
人氣指樹
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Are you like a cat?You don't look like a cat. But you and a cat have something in common: You are both alive. People and plants and animals are all alive, but is a doll alive? Or your tricycle? How can you tell? Read and find out what makes something alive, and what all living things need to stay healthy.

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