A.45% B.50% C.55% D.60%
A.1磅 B.1.5磅 C.2.2磅 D.3磅
A.營(yíng)業(yè)成本 B.營(yíng)業(yè)費(fèi)用 C.營(yíng)業(yè)收入 D.毛利額