The young dancers looked so charming in their beautiful clothes that we took _____ pictures of them.  [ ]

A. many of    

B. masses of        

C. the number of    

D. a large amount of

患者心脏听诊，心率72次/分，心律规则，一般不考虑（）

A.心房扑动伴固定比例（4：1）房室传导

B.第一度房室传导阻滞

C.第一度窦房阻滞

D.完全性房室传导阻滞

E.窦性心律