_______in the forests for nearly a week, the two students were finally saved by the local police. A.Having lost B.Lost C.Being lost D.Losing 答案:C 解析: 略4.一物体自t=0时开始做直线运动,其v-t图象如图所示,下列选项正确的是 ( )A.在0~6s内,物体离出发点最远为30mB.在0~6s内,物体经过的路程为30mC.在0~4s内,物体的平均速率为7.5m/sD.在4~6s内,物体做匀变速直线运动,加速度大小为10m/s2