单项选择题
A.数量、成本、利润 B.收入、成本、利润 C.数量、支出、利润 D.收入、支出、利润
A.30% B.33% C.40% D.44%
A.0.75,0.35 B.0.75,0.25 C.0.25,0.75 D.0.75,0.75