A big party was held in NO.18 Middle School last night, the teacher with students _____ singing and

dancing happily at the party. [ ]

A. is

B. was

C. are

D. were

患者男性，58岁，双手抖动伴运动迟缓6年。查体：面具脸，记忆力稍差，拇指与示指呈搓丸样静止性震颤，齿轮样肌强直，手指扣纽扣、系鞋带等困难，书写时字越写越小，慌张步态，顽固性便秘。

该患者最可能的诊断是

A．特发性震颤

B．帕金森病

C．肝豆状核变性

D．亨廷顿舞蹈病

E．多系统萎缩

F．帕金森综合征