Tom and Mary _____ two friends here. [ ]
A. has got
B. have got
C. hasn't got
D. has
答案:B
急性多发性龈脓肿与牙周脓肿的不同之处在于()
A.皆发生于牙周炎患者
B.脓肿一般接近根尖
C.全口多个牙泛发
D.治愈后牙龈不能完全恢复正常
E.可探及深牙周袋
周围神经病损的病理改变为()
A.瓦勒变性
B.轴索变性
C.节段性脱髓鞘
D.神经失用
E.轴索断裂