求翻译：本文主要采用文献资料法、调查问卷法、 观察法和实践研究法等研究方法，并在前人提出的分层教学的基础上，通过在河南省某中学进行的实际的教学实验，来验证分层教学对学生学习兴趣的培养和学习成绩的提高是否有积极的影响。是什么意思？

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This article is primarily a bibliographic information law law, questionnaires, observation law and practice, and research methods, research methods in the former the FLATTED teaching, on the basis of a middle school in Henan Province through practical teaching experiments to verify that stratificati

This article mainly uses literature research techniques and so on material law, questionnaire law, method of inspection and practice methodology, and in the lamination teaching foundation which the predecessor proposed, through actual teaching experiment which carries on in Henan Province some middl

This article mainly uses laws on documentation, questionnaires, observation of law and practice of research methods, research methods, teaching on the basis of the question and the predecessor, by a middle school in Henan province for practical teaching experiment to validate the layering teaching t

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