A.50歐姆B.0歐姆C.20兆歐D.75歐姆
A.64mS 亮\800mS 滅B.64mS 亮\3000mS 滅C.64mS 亮\300mS 滅D.64mS 亮\1000mS 滅
A.混頻B.調(diào)制C.輻射D.疊加