A.cross-bordercommerce
B.cross-bordertrade
C.cross-borderelectroniccommerc
D.cross-bordercommunication
A.RCT
B.Review
C.Systematic Reviews
D.Practice Guideline
A.RCT
B.Review
C.Systematic Reviews
D.Practice Guideline
A.预印本的英文名称是E-print
B.预印本是指正式出版前在网上发布的文献
C.预印本没有著作权
D.正式出版前在学术会议上交流的文献亦属于预印本
A.Micro cell
B.Macro cell
C.Middle size cell
D.以上答案均不对