已知工频对称三相电路中，A相电压为220V，初相为30°，则

A.C相电压的解析式是( )

B.uB＝220sin(100πt-120°)V，uC＝220sin(100πt+120°)V

C.uB＝220sin(100πt-90°)V，uC＝220sin(100πt+150°)V

D.uB＝220/2sin(100πt-120°)V，uC＝220/2sin(100πt+120°)V

E.uB＝220/2sin(100πt-90°)V，UC＝220/2sin(100πt+150°)V