单项选择题
A.2% B.5% C.10% D.15%
A.±5%;±5% B.±5%;±10% C.±10%;±5% D.2.5%;±5%
A.1.2-1.5,2 B.0.5-0.8,2 C.1.2-1.5,1.5 D.0.8-1.0,2
A.3-5 B.5-8 C.1-3 D.8-10
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