Song, Yanjie
Zhu, Zhiliang
Zhang, Wei
Yu, Hai
Funding for this research was provided by:
National Natural Science Foundation of China (61374178, 61402092, 61603182)
Online Education Research Fund of the MOE Research Center for Online Education of China (2016ZD306)
Doctoral Start-up Foundation of Liaoning Province (201501141)
Fundamental Research Funds for the Central Universities (N171704004)
Article History
Received: 14 May 2018
Revised: 8 January 2019
Accepted: 22 January 2019
First Online: 6 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.All the authors have been informed about this submission.This research does not involve any animals.