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