．Many in the credit industry expect that credit cards will eventually ________ paper money for almost every purchase.

A.exchange   B.decrease                   C. trade                          D replace

患者双上肢呈下运动神经元性瘫，双下肢呈上运动神经元性瘫，病变平面以下各种感觉缺失，肩部及上肢可有放射性根痛，括约肌障碍，此表现损害脊髓哪个节段（）

A.颈膨大

B.胸髓

C.骶膨大

D.腰膨大

E.高颈段