下列错畸形哪项可能不是遗传造成（）
A.上前牙区多生牙
B.牙列拥挤
C.上颌前突
D.后牙反
E.以上都不是
参考答案：E
--- Why does she always ask you for help? ----- There is no one else _______, is there?
A．who to turn to
B．she can turn to
C．for whom to turn
D．for her to turn
医疗保险制度的建立，必须遵循哪几项原则？
sk you for help? ----- There is no one else _______, is there?