單項選擇題下頜角在生長發(fā)育中,可因人種、年齡、性別等而有所不同。12歲時恒牙咬合完成時,下頜角為()
A.140°~160°
B.130°~140°
C.120°~125°
D.100°~110°
E.以上都不是
A.140°~160°
B.130°~140°
C.120°~125°
D.100°~110°
E.以上都不是