交流电路视在功率S=1000VA,无功功率Q=800var,则有功功率P=(____)。
A200W$;$600VA$;$600var$;$600W
B200W$;$600VA$;$600var$;$600W
C200W$;$600VA$;$600var$;$600W
D200W$;$600VA$;$600var$;$600W
A200W$;$600VA$;$600var$;$600W
B200W$;$600VA$;$600var$;$600W
C200W$;$600VA$;$600var$;$600W
D200W$;$600VA$;$600var$;$600W