There is too much noise outside.I can hardly _____ my attention on my book. [ ]

A. fill                          

B. pay

C. connect

D. concentrate

需与急性感染性多神经根炎鉴别的疾病有（）

A.脊髓灰质炎

B.急性脊髓炎

C.脊髓肿瘤

D.急性脑干炎

E.肠道病毒感染所致的急性弛缓性瘫痪