0.5米,0.45千米,0.75l,0.425kg,60分之35小时
50cm=0.5m450m=0.45千米740ml=0.74425克=0.425千克35分=7/12时1时=60分
50cm=0.5m,450m=0.45千米,740ml=0.74l,425克=0.425千克,35分=7/12时