(1).颗粒剂
(2).微丸
(3).胶囊剂
(4).滴眼剂

A.粒度检查

B.装量差异检查

C.两者均是

D.两者均不是

I really wonder ______ he has posted me many parcels _____ we worked together .

A．how ; after

B．why ; when

C．when ; before

D．why ; since