Nothing but some ancient Chinese coins _______ in the sunken ship since they began the exploration. [ ]

A. were found        

B. was found       

C. have been found  

D. has been found

认为迁移就足心理感官通过训练而发展的结果。这种理论是（）

A.经验内化说

B.关系转化说

C.形式训练说

D.共同要素说