Huo, Rui-ping
Zhang, Xiang
Zhang, Cai-feng
Funding for this research was provided by:
Applied Basic Research Project of Shanxi Province (201801D221080, 201801D121257)
Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi (2019L0814)
Teaching reform project of Taiyuan Normal University (JGLX1815)
Article History
Received: 12 July 2019
Accepted: 28 August 2019
First Online: 22 October 2019
Compliance with ethical standards
:
: The authors declare that there is no conflict of interest.