2023 Shanghai Question 10 Single-choice Differentiating 2023_上海 Paper 10.(3分)炮管发射数百次炮弹后报废,炮弹飞出速度为1000m/s,则炮管报废前炮弹在炮管中运动的总时间长约为( ) A. 5 秒B. 5分钟C. 5小时D. 5 天 Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →