下列哪种根尖发育完成的恒牙牙体急性损伤最容易并发牙髓坏死？（）
A.牙震荡
B.冠根折
C.突出性脱位
D.嵌入性脱位
E.完全脱位
参考答案：D
I was expecting a present from her, so I was disappointed I didn’t receive ______.
A．it
B．one
C．that
D．the one
232，364，4128，52416，( )
A．64832
B．624382
C．723654
D．87544
