题目

There is no possibility ________ he will keep his word．He is always telling lies. A．how   B．whether     C．when           D．that 答案：D一个物体由静止开始做匀加速直线运动，第1s内的位移是1m，物体在第3s内的位移是A.2 mB.3 mC.5 mD.8 m