单项选择题
A.1.15倍 B.1.3倍 C.1.43倍 D.1.55倍
A.8000kVA B.10000kVA C.12000kVA D.15000kVA
A.电压降低10%，光通量约降低27% B.电压升高10%，光通量约升高21% C.电压降低10%，光通量约降低21% D.电压升高10%，光通量约升高10%
A.4m B.5m C.6m D.7m
微信扫一扫,加关注免费搜题
