He _____ play the piano now, but he _____ play it one year ago.[ ]

A. couldn't; can

B. can; couldn't

C. can; could

D. could; can

骨盆骨折多引起()

A．膜部 * * 损伤 

B．球部 * * 损伤 

C．膀胱损伤 

D．输尿管损伤 

E．肾损伤