A.高于道路峰值附著系數(shù)85% B.大于或等于峰值附著系數(shù)75% C.大于90% D.大于等于90%
A.不大于700N B.不大于600N C.不大于500N D.不小于800N
A.30 km/h B.40 km/h C.50 km/h D.20 km/h