Twin-block矫治器上下咬垫交角为A.30° B.45° C.50°

练习题库2022-08-02  12

问题 Twin-block矫治器上下咬垫交角为A.30°B.45°C.50°D.55°E.60°

选项 A.30°
B.45°
C.50°
D.55°
E.60°

答案 B

解析
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