--- Do you have any problems _______ your maths? --- No, I don’t. But I need some help _____ my English. A. on, on B. with, with C. on, with D. with, on 答案:B 某物体由静止开始做直线运动,物体所受合力F随时间t的变化图象如图所示,下列关于该物体运动情况的说法正确的是( )A.物体在2~4s内做匀加速直线运动B.物体在4s末离出发点最远C.物体始终向同一方向运动D.物体在0~4s和在4~8s内的位移相同