单项选择题
A.0.3mm B.0.4mm C.0.5mm D.0.6mm
A.0.75D B.1.25D C.2.00D D.2.25D
A.1~2 B.1.5~2 C.2~3 D.1~1.5
A.-5.00DB.-5.50DC.-6.00DD.-6.50D
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