发表于本刊的所有文章,均应标注中图分类号和文献标识码,请作者在投稿时注意。中图分类号的标注要准确和全面,不可错标、漏标或不标。详细请登陆http://ztflh.jourserv.com/查询。文献标识码(Doc ument code)的作用在于对文章按其内容进行归类,以便于文献的统计、期刊评价、确定文献的 All articles published in this publication should be marked in the class code and document identification code, please pay attention to the author. In the figure classification number of the mark to be accurate and comprehensive, not wrong mark, missed mark or not marked. For details, please visit http://ztflh.jourserv.com/ query. Document code (Doc ument code) role is to classify the content of the article, in order to facilitate the statistics of the literature, journal evaluation, to determine the literature