Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience.[ ]

A. /; the  

B. /; an

C. an; an  

D. the; the

关于舌癌描述错误的是

A．多数为鳞癌
B．是最常见的口腔癌
C．舌后1/3癌肿属口咽癌范畴
D．生长快，浸润必较强
E．主要以血道软移为主