单项选择题
A.10~20mm B.40~50mm C.60~80mm D.4~8mm
A.10~20mm B.15~20mm C.10~25mm
A.0.10 B.0.05 C.0.08
A.0.2~0.5 B.0.3~0.6 C.0.5~1.0
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