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单项选择题设两电流分别为i1=5sin(Πt+3Π/4)A,i2=4sin(Πt-Π/2)A,,则i1对i2的相位差为()

A、超前Π/4rad

B、滞后3Π/4rad

C、滞后Π/4rad

D、超前3Π/4rad

  • B
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