China's railway system has carried out a real-name ticket purchasing system, _____ requires

passengers to provide their ID numbers when buying tickets. [ ]

A. in which        

B. whose            

C. who              

D. which

巴甫洛夫的经典条件反射理论是（）刺激—反应心理学思想的理论基础。

A.心理生理学

B.认知学派

C.人本主义学派

D.行为学派