题目

在测量平均速度的实验中，某同学用刻度尺测量小车通过的路程（如图甲所示），用停表测量小车通过该段路程所用时间（如图乙所示），则小车通过的路程为 cm，小车运动的时间为 s。 答案：【1】64.0【2】32All the people had to wear face masks when they went out. (改为一般疑问句)_______ all the people _______ to wear face masks when they went out?