Ⅰ度拥挤的拥挤量是A.2~4 mm B.10~12 mm C.4~6 mm D.8~10 mm E.5~8 mm

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问题 Ⅰ度拥挤的拥挤量是

选项 A.2~4 mm
B.10~12 mm
C.4~6 mm
D.8~10 mm
E.5~8 mm

答案A

解析
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