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Authors
Du, Bingxin https://orcid.org/0000-0002-6107-2847
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Funding
Funding for this research was provided by:
Key scientific research projects of colleges and universities in Henan Province (22A880001)
the project of science and Technology Department of Henan Province (192102310288)
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Article History
Received: 28 May 2022
Accepted: 29 July 2022
First Online: 10 August 2022
Declarations
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: The datasets generated during and/or analysed during the current study are freely crawled from ClassCentral Platform (), they are also available from the corresponding author on reasonable request.
: The data for our study was collected from publicly available reviews site for free online courses. There was no animal involved in this study.
: Publicly available data is collected and used in accordance with the reviews site’s Privacy Policy ().
: The authors declare that they have no confict of interest.
