Our school was offered________by the local government,which delighted all of us.[ ]

A. many equipments  

B. much equipment

C. lots of equipments  

D. a number of equipment

主动脉瓣关闭不全的患者不可能出现的体征是（）

A.心前区震颤

B.主动脉瓣区第二心音减弱

C.脉压增大

D.水冲脉

E.杜氏二重杂音