题目

阅读下面的短文，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。A lot of films have tried to describe our memories of family members who have passed away. But few have done as【1】(remark) as Coco, Disney-Pixar’s latest animation, 【2】 hit the big screen on Nov. 24 and won the Oscar in 2018.【3】(inspire) by the Mexican holiday of Day of the Dead, the film’s production team created a young boy, Miguel, who wants his family to understand his love of music. An accident takes him to the Land of the Dead. While there, Miguel has【4】unforge甲车的质量是2 kg，静止在光滑水平面上，上表面光滑，右端放一个质量为1 kg的小物体．乙车上表面粗糙,质量为4 kg，以5 m/s的速度向左运动，与甲车碰撞以后甲车获得8 m/s的速度，小物体滑到乙车上．若乙车足够长，  求:(1) .乙车与甲车碰后瞬间乙车的速度?(2) .小物体滑上乙车达到相对静止时二者的共同速度?