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°

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问题 乳牙建完成时下颌角为

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

答案C

解析
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