题目内容:
乳牙建完成时下颌角为
A.140°~160° B.120°~125° C.130°~140° D.150°~170° E.100°~120°
参考答案:
乳牙建完成时下颌角为
A.140°~160° B.120°~125° C.130°~140° D.150°~170° E.100°~120°