单项选择题
A.0.5mm B.0.75mm C.1mm D.2mm
A.105％，92％ B.105％，95％ C.105％，98％ D.108％，92％
A.30 B.35 C.50 D.28
A.100N，20mm B.150N，30mm C.100N，30mm D.200N，30mm
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