题目

Was it in the village _____ we used to live in _____ the accident happened? A . where; that B . which; that C . that; where D . where; which 答案：B11．一做匀变速直线运动质点，加速度大小为2m/s2，从零时刻起经过2s，速度达到8m/s，则该质点在2s内的位移为12m，第三秒内的位移为9m，第四秒内的平均速度为11m/s．该速度比第三秒内的平均速度大2m/s．