系指在水中或规定的释放介质中以零级或接近零级速率释放药物的（）.

A．硬胶囊 

B．软胶囊 

C．缓释胶囊 

D．控释胶囊 

E．肠溶胶囊

They put forward a lot of plans at the meeting, none of _______ were carried out in their work.

A．which

B．them

C．what

D．that