脊柱CT扫描不能用于检查下面哪种疾病（）

A.椎管狭窄及椎管内占位性病变

B.椎间盘变性或病变

C.椎骨外伤

D.椎骨良恶性肿瘤

E.脊髓灰质炎

—Is there anyone here name _______ is Betty?

—Sorry, I don't know. [ ]

A. who

B. which

C. whom

D. whose