单项选择题
A.3.08Ω B.2.25Ω C.1.43Ω D.20Ω
A.2.9MPa_+0.1MPa B.2.4MPa±0.16MPa C.0.19MPa±0.05MPa D.0.32MPa±0.05MPa
A.2.6MPa±0.05MPa B.2.4MPa±0.15MPa C.0.2MPa±0.02MPa D.0.39MPa±0.02MPa
A.M6 B.M8 C.M10 D.M5
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