题目

如图所示，坐高铁从杭州到南京，原需经上海再到南京，其路程为s1，位移为x1。杭宁高铁通车后，从杭州可直达南京．其路程为s2，位移为x2，则（   ）  A．s1> s2 ，x1> x2    B． s1> s2，x1< x2  C．s1> s2 ，x1 =x2   D．s1 =s2 ，x1 =x2      答案：C---Having many helpers makes a task easier and faster to complete.---I think so. _______A.Many hands make light workB.Too many cooks spoil the brothC.The early bird catch the wormD.The more you learn, the more you know