As his disease has         him, Hawking has to sit in his wheelchair and speak through a computer.    [ ]

A. disabled                      

B. enabled

C. disability                    

D. enabled

畸胎瘤多位于（）

A.前纵隔

B.前上纵隔

C.后纵隔

D.后上纵隔

E.中纵隔