选A设相遇时间为tS=V0t+1/2at²所以S良=103t+1/2×13t² S驽=97t-1/2×0.5t² S良+S驽=S总103t+1/2×13t² +97t-1/2×0.5t² =1125×2(t+16)²=61624²=576 25²=625 24<(t+16)<258所以，应该是第九日相遇，选A
你还是蒙一个吧？国考题？
D
