口腔的下壁为（）。
A.舌下区
B.舌背
C.唇颊齿良沟
D.下颌舌骨肌
参考答案：A
Happiness and success often come to those are good at recognizing their own strengths.
A．where
B．who
C．what
D．which
（）是网点日常营销工作的组织者。
A、网点经理
B、大堂经理
C、客户经理
D、营销主管
