In order to have _____ better understanding of the accident, the three witnesses were called for _____ second meeting．

A．a; a

B．the; a

C．a; 不填

D．不填; the

叩击跟腱引起相连的同块肌肉收缩，属于（）

A.肌紧张

B.腱反射

C.屈肌反射

D.姿势反射

E.多突触反射