I think teachers should be strict _______ their students ______ studies.

A．in; with

B．with; in

C．about; in

D．with; for

氯霉素-β环糊精包合物

A．增加药物的溶解度
B．提高药物的稳定性
C．液体药物的粉末化
D．遮盖药物的不良嗅味
E．防止挥发性成份的挥发