A.△V>50V×(±1.5%) B.△V>50V/(±1.5%) C.△V≤50V×(±1.5%) D.△V≤50V/(±1.5%)
A.5 B.10 C.15 D.20
A.G=P-EIRP+LF+Lf B.G=P-EIRP-LF-Lf C.G=P+EIRP+LF+Lf D.G=EIRP+LF+Lf-P