单项选择题
A.±1% B.±0.5% C.±2% D.±1.5%
A.0~100% B.10%~90% C.20%~80% D.30%~70%
A.1 B.2 C.3 D.4
A.10mmX10mmX50mm B.10mmX10mmX55mm C.15mmX15mmX50mm D.15mmX15mmX55mm
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