The millionaire passed away, leaving his children with a large ______.

A．fortune

B．luck

C．sum

D．amount

为了提高维生素A的稳定性，通常采用（）

A.粉末直接压片

B.包衣

C.制成微囊或包含物

D.制成固体制剂

E.制成注射剂