单项选择题
A.0-25mm B.0-35mm C.15-25mm D.10-20mm
A.1000-1300 B.1300-1450 C.1350-1500 D.1500-1600
A.490-550 B.440-500 C.550-560 D.560-620
A.20 B.25 C.30 D.35
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