一块菜地,今年收白菜15吨,比去年增产20%,去年这块菜地收白菜多少吨?
15÷(1+20%),
=15÷120%,
=12.5(吨);
答:去年这块菜地收白菜12.5吨.
_____ you keep on working hard, I don’t mind whether you get good marks in your class.
A.As long as
B.As soon as
C.As well as
D.as far as
速度大于120km/h地段轨面擦伤深度超过2mm为重伤。