Instead of boring old textbooks which are quickly_____ you can have an interactive learning experience through MOOCs.
A、upgraded
B、updated
C、out of date
原创文章,作者:siyueedu,如若转载,请注明出处:https://www.siyueedu.com/179353.html
A、upgraded
B、updated
C、out of date
原创文章,作者:siyueedu,如若转载,请注明出处:https://www.siyueedu.com/179353.html