单项选择题
A.2±0.5mm B.1.5±0.5mm C.2.5±0.5mm
A.75±5mm B.85±5mm C.118±5mm
A.160±5mm B.147±5mm C.118±5mm
A.X1 B.X2 C.X3 D.X4 E.X5
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