交流电路有功功率P=600W,无功功率Q=800var,则视在功率S=(____)。
A1000$;$1000W$;$1000var$;$1000VA
B1000$;$1000W$;$1000var$;$1000VA
C1000$;$1000W$;$1000var$;$1000VA
D1000$;$1000W$;$1000var$;$1000VA
A1000$;$1000W$;$1000var$;$1000VA
B1000$;$1000W$;$1000var$;$1000VA
C1000$;$1000W$;$1000var$;$1000VA
D1000$;$1000W$;$1000var$;$1000VA