单项选择题
A.35 B.40 C.23 D.20
A.3500+120+80-(1400-60)-17.5- 125-400-30-100+120+80 B.3500+120+80-(1400-60)-20-125- 400-30-(100-40)+120+80 C.3500+120+80-(1400-60)-21-125- 400-30-(100-40)+40+120+80 D.3500+120+80-(1400-60)-13.5- 125-400-30-(100-40)+120+80
A.75 B.48 C.45 D.60