单项选择题
A.7个 B.9个 C.10个 D.11个
A.0.1Ω B.0.2Ω C.0.3Ω D.0.4Ω
A.18mm B.18.5mm C.19mm D.20mm
A.1350mm±2mm B.1350mm±3mm C.1351mm±3mm D.1352mm±3mm
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