The professor has written another book ____ of great importance to computer science.

A．which I think it is

B．and I think is

C．which I think is

D．when I think is

下列改造剂型方法哪种有利于提高老年人的依从性（）

A．缓释剂

B．注射剂

C．糖浆剂

D．胶囊剂

E．泡腾片