A.0.8s~1.0s B.1.0s~1.2s C.1.1s~1.2s D.1.2s~1.4s
A.5m/s B.5.5m C.7m/s D.8m/s
A.0km/h~30km/h B.3km/h~30km/h C.3km/h~50km/h D.5km/h~50km/h