单项选择题
蝶鞍前后径和深径的平均值分别为()
A.10.5mm,9.5mm
B.11.7mm,9.5mm
C.12mm,10mm
D.5mm,10mm
E.10mm,20mm
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单项选择题
A.10.5mm,9.5mm
B.11.7mm,9.5mm
C.12mm,10mm
D.5mm,10mm
E.10mm,20mm
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