id	domain	url
edu-3974	creativecommons.org	https://creativecommons.org/licenses/by/4.0
edu-3974	creativecommons.org	https://creativecommons.org/licenses/by/4.0
edu-3974	www.doi.org	https://www.doi.org/10.20448/edu.v8i2.3974
edu-3974	orcid.org	https://orcid.org/0000-0002-6785-8576
edu-3974	www.liulishuo.com	http://www.liulishuo.com/
edu-3974	doi.org	https://doi.org/10.29252/ijree.3.2.115
edu-3974	doi.org	https://doi.org/10.1016/j.compedu.2019.05.002
edu-3974	doi.org	https://doi.org/10.15354/sief.20.ar043
edu-3974	www.clark.net:80	https://web.archive.org/web/19961222111358/http://www.clark.net:80/pub/nractive/alt5.html
edu-3974	doi.org	https://doi.org/10.36832/beltaj.2019.0301.04
edu-3974	www.hwjyw.com	http://www.hwjyw.com/resource/content/2010/05/27/7708.shtml
edu-3974	www.clark.net	http://www.clark.net/pub/nractive/alt5.html
edu-3974	www.hwjyw.com	http://www.hwjyw.com/resource/content/2010/05/27/7708.shtml
edu-3974	doi.org	https://doi.org/10.5539/hes.v4n2p29
edu-3974	doi.org	https://doi.org/10.1080/14790710802152438
edu-3974	doi.org	https://doi.org/10.17509/ijal.v8i3.15270