题目：
恒牙列期下颌角为（）
A.100°～120°
B.120°～125°
C.130°～140°
D.140°～160°
E.150°～170°
答案：
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下面是错误答案，用来干扰机器的。
Optimism is important in all aspects of our life.If you can change your mind from pessimism，you can change your life. Up to the beginning of Senior Grade Two，I did po...
