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【单选题】
两个同频率 的正弦电流 i1 和 i2 ,其有效值相等,均为 6A ,已知 i1+i2 的有效值为 10.4A ,则 i1 和 i2 之间的相位差可能是A.
30 0
B.
45 0
C.
60 0
D.
120 0
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