这些问题可分为三组：投入，实践和反馈的挑战。
These problems can be categorized into three groups: input, practice and feedback challenges.
采用调查研究、理论分析和实践反馈相结合的研究方法，分析高校毕业设计答辩存在的问题和面临的挑战。
By employing research approach of investigation, theoretical analysis and practice feedback, the existing problem and facing challenge of university final project defense are analyzed.
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