Excuse me, where is the post office? [ ]

A. It's next to the cinema.

B. You can take the No. 15 bus.

C. I'll go with you.

D. The bus station is over there.

下列可促进骨形成的药物是（）

A.氟化钠

B.甲状旁腺激素

C.降钙素

D.双磷酸盐类

E.益钙宁