题目

关于运动和力，下列说法正确的是（ ） A . 汽车速度越大越难以停下来，说明物体速度越大，惯性越大 B . 甲乙两队进行拔河比赛甲队获胜，说明甲队拉乙队的力大于乙队拉甲队的力 C . 推门时手离门轴越远越省力，说明力的作用效果与力的作用点有关 D . 汽车可处于静止状态，也可处于运动状态。但房子总处于静止状态_______ of danger in the street at night, she had to go home with a friend_______ her. A．Warned; accompanied                   B．Having warned; accompanying C．Warning; accompanying                  D．Having been warned; accompanying