Zhu, Zhiliang
Song, Yanjie
Zhang, Wei
Yu, Hai
Zhao, Yuli
Funding for this research was provided by:
National Natural Science Foundation of China (61374178)
National Natural Science Foundation of China (61402092)
National Natural Science Foundation of China (61603082)
Online Education Research Fund of the MOE Research Center for Online Education (2016ZD306)
Ph.D. Start-Up Foundation of Liaoning Province (201501141)
Fundamental Research Funds for the Central Universities (N171704004)
Article History
Received: 6 February 2019
Revised: 20 April 2020
Accepted: 8 June 2020
First Online: 3 July 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.