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著者:
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Mullins, Matt. |
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题名:
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Friction / , |
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出版发行:
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出版地： New York 出版社： Scholastic 出版日期： 2012 |
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载体形态:
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48 pages 23cm. |
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内容提要:
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Describes friction, explains why smooth and rough surfaces provide different levels of friction, and includes information on air resistance and lubrication. |
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主题词:
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Friction |
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主题词:
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Lexile Quiz |