乳牙建完成时下颌角为A.100°~120° B.120°~125° C.130°~140° D.1400~160° E.150°~170°

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问题 乳牙建完成时下颌角为

选项 A.100°~120°
B.120°~125°
C.130°~140°
D.1400~160°
E.150°~170°

答案C

解析
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