单项选择题
A.0.2~0.4 B.0.4~0.6 C.0.6~0.8 D.0.8~1
A.60% B.80% C.100% D.110%
A.1.1 B.1.25 C.1.45 D.2
A.电器开关 B.绝缘工具 C.仪表
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