心尖区触及舒张期震颤，最可能的是（）
A.二尖瓣狭窄
B.二尖瓣关闭不全
C.主动脉瓣狭窄
D.室间隔缺损
E.动脉导管未闭
参考答案：A
Near the table _____ a poor dog, who desired to satisfy his hunger with _____ fell from the table.[ ]
A. laid; something
B. lay; that
C. laid; that
D. lay; what
对偶三角瓣适用于（）
A.整复邻近组织的缺损
B.松解挛缩的瘢痕
C.覆盖感染的创面
D.作毛发的移植
E.器官再造
