主要功能：建立文件、写文件、读文件、显示文件、删除文件、重命名文件、查询文件属性、关闭文件。
Main functions: document creation, document writing, reading documents, documents, delete files, rename files, querying document attributes, Close document.
主要功能：建立文件、写文件、读文件、显示文件、删除文件、重命名文件、查询文件属性、关闭文件。
Main functions: document creation, document writing, reading documents, documents, delete files, rename files, querying document attributes, Close document.
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