单项选择题
A.0.6~1.0B.0.7~1.1C.0.8~1.2D.0.9~1.3
A.300~500B.400~600C.500~700D.600~800
A.1mB.1.5mC.2mD.2.5m
A.6mmB.8mmC.10mmD.12mm
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