恒牙列期下颌角为A.140°～160° B.120°～125° C.130°～140° D.150°～170° E.100°～120°

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问题恒牙列期下颌角为

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

答案B

解析

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