The library she worked in lent books, magazines, audio-cassettes and maps to its customers , who could keep them for four weeks.

A．borrowers

B．lenders

C．patrons

D．clients

脊髓空洞症和肌萎缩侧索硬化的鉴别主要在于（）

A.肌萎缩侧索硬化有肌肉萎缩

B.肌萎缩侧索硬化有肌肉无力

C.肌萎缩侧索硬化有上下神经元受损的症状

D.肌萎缩侧索硬化无明显感觉异常和营养障碍

E.以上都正确