新冠肺炎疫情期间，线上教学作为应急教育策略，保证了教学工作的稳步开展.本文总结了北航物理学院在疫情期间线上教学的实践经验，分析了“学生线上学习体验”的调研数据及访谈内容.结果表明学生对线上线下两种学习模式的学习体验存在显著差异( 如师生互动频度、学习压力) ，并且这种差异会随着学习时间的推移发生变化. 学生高度认可线上教学交互环节的设计以及论文式等科学评价手段，并对返校后线上线下混合式教学模式充满期待.这场大规模线上教学实践在创新教学方法、提升学习挑战度、帮助学生实现自主学习的高阶目标等方面，都与一流课程建设的基本原则相契合，学生的反馈也为后续混合式一流课程的建设提供了重要参考.

Online teaching is an emergency education strategy that maintains the continuation of

teaching and learning during the COVID-19 pandemic. In this paper the online teaching experience in

physics college in Beihang University during the pandemic is summarized and data from four surveys

and interview contents of students' online learning experience is analyzed. The results show that

there are significant differences in students' learning experi-ence ( such as the frequency of teacher-student interaction，learning pressure，etc.) between online and in-person learning which varied with the learning time. The interactive design of online teaching and the scientific evaluation are highly approved by students，that fully expect to engage in the mixed online and in-person teaching after retur- ning to school. This large-scale

online teaching practice is consistent with the basic principles of the first-class cur- riculum development in terms of innovation of teaching methods，improvement of learning challenges，and helping students achieve the high-level learning goals. The feedback from students also serves as  an excellent guide for the development of the first-class courses.