Jumping out of ____ airplane at ten thousand feet is quite ____ exciting experience.

A．/; the

B．/; an

C．an; an

D．the; the

外伤患者，CT示双肾形态正常，但右肾强化不明显，最可（）

A．右肾血管撕裂伤

B．肾撕裂

C．真性破裂

D．肾动脉断裂

E．肾包膜下血肿