The schema theory is an important element in ______, which is action-based, more concerned with the process of learning than what is learnt.

A. Brunner's theory


B. Ausubel's theory
C. Kelly's theory


D. Piaget's theory

非水滴定法测定维生素B₁原料药的含量，应选( )。

A．淀粉指示剂
B．喹哪啶红-亚甲蓝混合指示剂
C．二苯胺指示剂
D．邻二氮菲指示剂
E．酚酞指示剂