单项选择题
A.10mm B.15mm C.20mm D.25mm
A.15N/cm B.20N/cm C.25N/cm D.30N/cm
A.男鞋用勾心,适用跟高20mm B.女鞋和儿童用用勾心,适用跟高20mm C.女鞋用勾心,适用跟高20mm D.儿童用勾心,适用跟高20mm
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