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著者:
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Branley, Franklyn Mansfield. |
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题名:
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Gravity is a mystery / , |
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出版发行:
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出版地： New York 出版社： HarperCollins 出版日期： 2007 |
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载体形态:
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33 pages 21 x 26 cm. |
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附注:
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Explains in simple text and illustrations what is known about the force of gravity. |
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主题词:
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Gravity |
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主题词:
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Force and energy |
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主题词:
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Juvenile literature. |
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主要责任者:
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Miller, Edward. |