俞正声:把中越全面战略合作伙伴关系推向更高水平
百度 在8000年前的中国史前时期，虽然在物质文化和精神文化层面取得了显著进步，但是社会整体上还是一个较为平等的原始社会。
You do not have permission to edit this page, for the following reason:
 | You have attempted to create a non-standard page. The creation of pages in certain "namespaces" has been restricted to registered users with accounts at least four days old due to those namespaces being reserved for particular content at Wikibooks that should only be edited by more experienced individuals. If you are certain that this page needs to be created, please request assistance. |
You can view and copy the source of this page.