---The girl is said to have ___ gift for teaching deaf children.

---She is something. I think it calls for ____ patience and imagination.

A．a, the

B．a, /

C．the, the

D．/, a

溶血空斑试验主要是用来检测何种细胞的功能（）

A.NK细胞

B.B细胞

C.单核细胞

D.吞噬细胞

E.T细胞