---What did you do yesterday?

---My brother took two friends of _______ to play chess with us. But I don’t know

________ of them.

A．his; all

B．him; both

C．his; either

D．him; neither

脊柱CT扫描可用于检查下面哪种疾病（）

A.早期髓核变性

B.所有椎间关节的病变

C.髓核积气

D.脊髓灰质炎

E.神经炎