【判断题】网上售后服务的特点包括便捷性、灵活性、低廉性和直接性四个方面。
【单选题】Working in conjunction, the two processes,______,contribute to what Piaget terms the central. process of cognitive adaptation.
A.
assimilation and accommodation
B.
recognition and realization
C.
generalization and contribution
D.
recommendation and conjuction
【单选题】Teaching and learning are two entirely different processes. They_________ in function. [ ]
【单选题】Teaching and learning _____ greatly from each other —they are two entirely different processes.
【单选题】加拿大的人口主要集中在狭长的南部走廊地带,有关其主要原因说法错误的是( )