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                <h1>中国的地势特征文件:</h1>
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                            <td><a class='down_stat doc_title' href="javascript:void(0);">1、我国的地势、地形的基本特征</a></td>
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                            <td><a class='down_stat doc_title' href="javascript:void(0);">第三章中国的自然资源</a></td>
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                            <td><a class='down_stat doc_title' href="javascript:void(0);">第一章中国的疆域和行政区划</a></td>
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