读南亚地形图和相关地图,回答下列问题.
一电梯在10s内可将质量为1.5t的货物由楼房底层匀速运至四楼楼顶,若每层楼高3m,那么电梯的功率是多少千瓦?
The little girl is fortunate to get help from so many strangers.