Many people claimed ________ the violent attack.

A．seeing

B．to see

C．have seen

D．to have seen

帕金森病的临床表现可包括()

A.腰痛、关节痛、肢体疼痛

B.瞬目、肢体联带动作少，言语缓慢、吞咽困难

C.便秘、尿频、直立性低血压、汗液分泌异常、头面部皮脂分泌减少

D.抑郁、皮质下痴呆