有关典型的成釉细胞瘤,下列叙述正确的是()。
A.组织发生自牙源性上皮
B.下颌前部好发
C.双侧多见
D.可形成釉质
E.生长快,早期出现症状
参考答案:A
—Could you please pass the book on the shelf to me ?
—_____. [ ]
A. You are welcome
B. Yes , I could
C. Certainly . Here you are