.

I made a call to my parents yesterday. To my disappointment, _________of them answered it.

A．either

B．none

C．neither

D．nobody

Garre骨髓炎的特点为（）

A.伴明显骨膜炎症反应

B.几乎均发生于上颌骨

C.死骨形成为其主要表现

D.又称致密性骨炎

E.可见朗格汉斯细胞