单项选择题
A.∠63×6 B.∠50×5 C.∠75×6 D.∠40×4
A.1.5m B.1.6m C.1.7m D.1.8m
A.0.5m B.0.6m C.0.8m D.1m
A.短路状态 B.满载状态 C.轻载状态 D.空载状态
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