苦参碱的结构是（）
A.
B.
C.
D.
E.
参考答案：C
The schema theory is an important element in ______, which is action-based,more concerned with the process of learning than what is learnt.
A．Kellys theory
B．Piagets theory
C．Brunners method
D．Ausubels theory
下列哪种食物含维生素A最丰富（）。
A.动物肝
B.鸡蛋
C.鲜牛奶
D.绿叶蔬菜
