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已知接成Y形的电阻都是30Ω，则等效△形的三个电阻阻值为（ ）。
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已知接成Y形的电阻都是30Ω，则等效△形的三个电阻阻值为（ ）。
A、全是10Ω
B、两个30Ω，一个90Ω
C、全是90Ω
时间：2021-07-19 02:42
关键词：
机械制造与自动化
高起专
电工与电气
2019级第三学期期末考试
答案解析
C
C
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